Kindness and intelligence are the preoccupations of age. Being cruel and thoughtless is far more fascinating when you're twenty.

But youth smiles without any reason. It is one of its chiefest charms.

— Young people, nowadays, imagine that money is everything.
— ...and when they grow older they know it.

"Well," she said, "I'm seventeen and I'm crazy. My uncle says the two always go together. When people ask your age, he said, always say seventeen and insane."

Youth is the one thing worth having.... It makes princes of those who have it.

"To start things off, what do you think of the world?"
"I don't know anything."
"The beginning of wisdom, as they say. When you're seventeen you know everything. When you're twenty-seven if you still know everything you're still seventeen."

Ascribe to fevers of young years
Their young delirium and stress.

The trouble with eternal youth is, you do tend to procrastinate.

He’s blessed, who in his youth was youthful!
He’s blessed, who well in time was ripe.