THE ACCIDENTAL DEATH OF CURLEY'S WIFE CH.5 (pg. 91)
"I don't want you tell yell."
In the beginning of the book, George and Lennie are sitting around a fire discussing their dream. They describe what their life will be like in the future and their hopes of owning their own ranch. The scene symbolizes the american dream and how everyone has a dream but it's up to you if you achieve it.
THE DEATH OF THEIR DREAM CH.6 (pg.106)
During this scene, Carlson kills Candy's best friend. He shoots the dog because of his old age and Candy wishes he was the last person to see his dog alive. This scene foreshadows Lennie's death later in the book. This effects their dreams and how dreams can get compromised.
In this scene, Lennie accidentally strangles Curley's wife to death. While Lennie is petting her hair he does understand his own strength and snaps her neck. This is the climax of the story and the highest part of the story where the dream begins to die. Sometimes you can be the downfall of your own dream.
In the end of book, Lennie looks away while George describes the dream to Lennie one last time. George shoots Lennie in the back of the head and kills him. Lennie's death is symbolic to their dream dying and how dreams will foil. Dreams do not come true in the end.