A moment's insight is sometimes worth a life's experience.

America is the only place where man is full-grown!

For the simplicity on this side of complexity, I wouldn't give you a fig. But for the simplicity on the other side of complexity, for that I would give you anything I have.

The sound of a kiss is not so loud as that of a cannon, but its echo lasts a great deal longer.

When men have realized that time has upset many fighting faiths, they may come to believe... that the ultimate good desired is better reached by free trade in ideas-- that the best test of truth is the power of the thought to get itself accepted in the competition of the market, and that truth is the only ground upon which their wishes safely can be carried out. That at any rate is the theory of our Constitution. It is an experiment. As all life is an experiment. Every year if not every day we wager our salvation upon some prophecy based upon imperfect knowledge.

Truth, when not sought after, rarely comes to light.

It is the province of knowledge to speak, and it is the privilege of wisdom to listen.