Highlight: Superstition plays a crucial role in the plot, particularly through Mrs. Lyons' manipulation of Mrs. Johnstone using supernatural beliefs.

Definition: Social class in the play represents the systematic barriers and opportunities that shape the characters' lives based on their economic status.

Example: The theme of nature versus nurture is explored through the twins' divergent life paths despite their identical genetic makeup.

Vocabulary: Nature vs. nurture refers to the debate about whether human behavior is determined by environment or genetics.

Quote: The theme of social class is emphasized through the "differences in education and class" showing "the difference in life and reality dependent on what family you're born in."

Quote: "I could have been him" - Mickey's words reflect the deep-seated class consciousness and regret that pervades the play.

Highlight: Mrs. Johnstone's line "By the time I was 25 I looked 42" powerfully illustrates the toll of poverty and hardship on the working class.

Example: The quote "We're blood brothers we have to stand by each other" demonstrates the unbreakable bond between Mickey and Eddie, despite their different upbringings.

Quote: "I agreed to give one of you away" - This pivotal moment sets up the entire tragic narrative and Mrs. Johnstone's impossible choice.

Definition: The term "Blood Brothers" refers to a sacred pact of loyalty between the twins, though they're unaware of their true relationship.