If ignorance is bliss, why isn't the world happier?

We all do no end of feeling, and we mistake it for thinking.

As a rule we develop a borrowed European idea forward, and ... Europe develops a borrowed American idea backwards.

And what is a man without energy? Nothing - nothing at all.

It's better to be an optimist who is sometimes wrong than a pessimist who is always right

But the elastic heart of youth cannot be compressed into one constrained shape long at a time.

I have at last, after several months' experience, made up my mind that [New York] is a splendid desert--a domed and steepled solitude, where the stranger is lonely in the midst of a million of his race.