“You are surprisingly immature. I can't ever understand how you resort to giggling at the slightest provocation. You, I repeat, are immature.”
“...childish, selfish, immature - that's right, I am. But do you know how much money I make for thinking this way?”
“Immature love says: 'I love you because I need you.' Mature love says 'I need you because I love you.”
“Enlightenment is man's emergence from his self-imposed immaturity. Immaturity is the inability to use one's understanding without guidance from another.”
“Birthdays: without them we'd be immortal. But just because you're not immortal, doesn't mean you can't be immature indefinitely.”
“You are only young once, but you can be immature for a lifetime”