Through our great good fortune, in our youth our hearts were touched with fire. It was given to us to learn at the outset that life is a profound and passionate thing.

We should be eternally vigilant against attempts to check the expression of opinions that we loathe.

Certitude is not the test of certainty.

The world is always ready to receive talent with open arms. Very often it does not know what to do with genius.

The ultimate good desired is better reached by free trade in ideas [and] the best test of truth is the power of the thought to get itself accepted in the competition of the market.

If I had a formula for bypassing trouble, I would not pass it around. Trouble creates a capacity to handle it.

Nothing can be so perfect while we possess it as it will seem when remembered.