Common sense is not so common.

I've always had an obligation to creation, above all.

Never accept a drink from a urologist.

It seldom happens that any felicity comes so pure as not to be tempered and allayed by some mixture of sorrow.

The gift of words is the gift of deception and illusion.

I want to put a ding in the universe.

There is only one difference between a madman and me. The madman thinks he is sane. I know I am mad.

Prayer does not change God, but it changes him who prays.

We can't become what we need to be by remaining what we are.

There is nothing more miserable in the world than to arrive in paradise and look like your passport photo.

There is no terror in the bang, only in the anticipation of it.

There is no such thing as a Christian child: only a child of Christian parents.

Patriotism is the last refuge of a scoundrel.

There is not such a cradle of democracy upon the earth as the Free Public Library, this republic of letters, where neither rank, office, nor wealth receives the slightest consideration.

Usually when people are sad, they don't do anything. They just cry over their condition. But when they get angry, they bring about a change.

What's with you men? Would hair stop growing on your chest if you asked directions somewhere?

I don't try to imagine a personal god; it suffices to stand in awe at the structure of the world, insofar as it allows our inadequate senses to appreciate it.

A mediocre idea that generates enthusiasm will go further than a great idea that inspires no one.

Common sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it.

Until we're educating every kid in a fantastic way, until every inner city is cleaned up, there is no shortage of things to do.

Liberty, according to my metaphysics is a self-determining power in an intellectual agent. It implies thought and choice and power.