"It's not who I am underneath but what I do that defines me."
Bruce says this to Rachel while he is defending Gotham City as Batman. His statement to her tells her that Bruce Wayne, her longtime friend, is the Batman because this statement is one she said to him previously in the film.
"Your father would be ashamed of you."
Rachel says this to Bruce after slapping him. He's revealed that he has a gun and that he intends to kill Falcone, the man he believes responsible for his parents' death. She's enraged the he could even think of doing this, let alone act upon it.
"And why do we fall, Bruce? So we can learn to pick ourselves up."
Bruce's father asks him this after his fall into a well as a young boy. The line is later echoed by Alfred at Bruce's lowest point during the film.
"This is a world you'll never understand, and you always fear what you don't understand."
Stated by Falcone during a confrontation with Bruce, the line serves as foreshadowing to Bruce's later vigilantism. As Batman, he turns fear against his enemies as a mysterious vigilante.
"It's time my enemies shared my dread."
In response to Alfred's question regarding his symbolic choice of a bat, Bruce states that he plans to use the object of his childhood fear (bats) against his enemies.
"A guy who dresses up like a bat clearly has issues."
Spoken as ironic humor as Bruce socializes with his billionaire playboy persona.
"People need dramatic examples to shake them out of apathy and I can't do that as Bruce Wayne. As a man, I'm flesh and blood, I can be ignored, I can be destroyed; but as a symbol - as a symbol I can be incorruptible, I can be everlasting."
This profound line is delivered as Bruce explains to Alfred his desire to be a symbol for Gotham City. He wants to inspire good, but he can't do that as Bruce Wayne. But as Batman, he can become a symbol of hope for the city.
"All creatures feel fear."
Spoken by Thomas Wayne to his son regarding the bats in the well. The simple line echoes the theme of fear woven throughout the movie.
