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Understanding the Cosmological Argument by Thomas Aquinas

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Kenadie

09/12/2025

Religious Studies

The Cosmological Argument

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9 Dec 2025

3 pages

Understanding the Cosmological Argument by Thomas Aquinas

user profile picture

Kenadie

@xdxkxdx

The cosmological argument is one of philosophy's most enduring attempts... Show more

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# The Cosmologisel Arganent

- looks at the idea that there should be something rather than
nothing.
-Existence requires an explanation, the

The Cosmological Argument Basics

Ever wondered why anything exists at all? The cosmological argument tackles this mind-bending question by suggesting that everything needs an explanation - and the best one is God.

This argument isn't new. Ancient Greek philosophers like Aristotle and Plato first explored these ideas around 300-400 BC. However, it was Thomas Aquinas (1225-1274) who really made it famous with his brilliant theological work.

Aquinas was convinced that you could find evidence for God's existence just by looking at the natural world around you. He called these clues the 'fingerprints of God' and developed his 'first three ways' to prove God exists through logic and observation.

Key Concept: Aquinas distinguished between potentiality (something that could happen or change) and actuality (when that change actually occurs). This distinction is crucial for understanding his arguments.

# The Cosmologisel Arganent

- looks at the idea that there should be something rather than
nothing.
-Existence requires an explanation, the

Aquinas' First and Second Ways

The First Way argues that everything moving must have been set in motion by something else. You can't have an endless chain of movers - there must be an unmoved mover at the start of it all, which Aquinas identifies as God.

Think of it like dominoes falling. Each domino needs the previous one to knock it over, but something had to tip the first domino. Aquinas wasn't just talking about the beginning of time - he meant that God constantly sustains all movement and change in the universe right now.

The Second Way focuses on cause and effect. Every effect needs a cause, and you can't go backwards through causes forever. There must be a first cause - an efficient cause that started everything but wasn't caused by anything else.

Remember: Aquinas built these arguments on a posteriori reasoning - evidence from observing the world around us, not just pure logic.

# The Cosmologisel Arganent

- looks at the idea that there should be something rather than
nothing.
-Existence requires an explanation, the

Aquinas' Third Way

The Third Way introduces two crucial concepts: contingent beings (things that depend on something else to exist) and necessary beings (things that exist independently and don't need anything else).

Everything you see around you is contingent. You exist because your parents existed, trees need soil and water, planets need gravity. These things are temporally dependent - they rely on outside factors both to come into existence and to keep existing.

If everything in the universe is contingent, then something necessary must have brought them all into existence. This necessary being - independent, uncaused, and eternal - is what Aquinas calls God.

Here's Aquinas' example: wood has the potential to be hot, but it needs fire (something already actual) to make it happen. God is the ultimate actual being that makes everything else possible.

Study Tip: All three ways use inductive reasoning based on a posteriori premises - they start with observations about the world and work towards conclusions about God.



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This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

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In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

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very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

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Xander S

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THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

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This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

 

Religious Studies

150

9 Dec 2025

3 pages

Understanding the Cosmological Argument by Thomas Aquinas

user profile picture

Kenadie

@xdxkxdx

The cosmological argument is one of philosophy's most enduring attempts to prove God exists by asking a simple question: why is there something rather than nothing? Thomas Aquinas, a brilliant medieval theologian, developed three powerful versions of this argument that... Show more

# The Cosmologisel Arganent

- looks at the idea that there should be something rather than
nothing.
-Existence requires an explanation, the

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Join milions of students

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The Cosmological Argument Basics

Ever wondered why anything exists at all? The cosmological argument tackles this mind-bending question by suggesting that everything needs an explanation - and the best one is God.

This argument isn't new. Ancient Greek philosophers like Aristotle and Plato first explored these ideas around 300-400 BC. However, it was Thomas Aquinas (1225-1274) who really made it famous with his brilliant theological work.

Aquinas was convinced that you could find evidence for God's existence just by looking at the natural world around you. He called these clues the 'fingerprints of God' and developed his 'first three ways' to prove God exists through logic and observation.

Key Concept: Aquinas distinguished between potentiality (something that could happen or change) and actuality (when that change actually occurs). This distinction is crucial for understanding his arguments.

# The Cosmologisel Arganent

- looks at the idea that there should be something rather than
nothing.
-Existence requires an explanation, the

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Aquinas' First and Second Ways

The First Way argues that everything moving must have been set in motion by something else. You can't have an endless chain of movers - there must be an unmoved mover at the start of it all, which Aquinas identifies as God.

Think of it like dominoes falling. Each domino needs the previous one to knock it over, but something had to tip the first domino. Aquinas wasn't just talking about the beginning of time - he meant that God constantly sustains all movement and change in the universe right now.

The Second Way focuses on cause and effect. Every effect needs a cause, and you can't go backwards through causes forever. There must be a first cause - an efficient cause that started everything but wasn't caused by anything else.

Remember: Aquinas built these arguments on a posteriori reasoning - evidence from observing the world around us, not just pure logic.

# The Cosmologisel Arganent

- looks at the idea that there should be something rather than
nothing.
-Existence requires an explanation, the

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Aquinas' Third Way

The Third Way introduces two crucial concepts: contingent beings (things that depend on something else to exist) and necessary beings (things that exist independently and don't need anything else).

Everything you see around you is contingent. You exist because your parents existed, trees need soil and water, planets need gravity. These things are temporally dependent - they rely on outside factors both to come into existence and to keep existing.

If everything in the universe is contingent, then something necessary must have brought them all into existence. This necessary being - independent, uncaused, and eternal - is what Aquinas calls God.

Here's Aquinas' example: wood has the potential to be hot, but it needs fire (something already actual) to make it happen. God is the ultimate actual being that makes everything else possible.

Study Tip: All three ways use inductive reasoning based on a posteriori premises - they start with observations about the world and work towards conclusions about God.

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.

Where can I download the Knowunity app?

You can download the app from Google Play Store and Apple App Store.

Is Knowunity really free of charge?

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Most popular content: Cosmological Argument

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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user