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.

The root of joy, as of duty, is to put all one's powers towards some great end.

Our test of truth is a reference to either a present or imagined future majority in favour of our view.

A great man represents a great ganglion in the nerves of society, or to vary the figure, a strategic point in the campaign of history, and part of his greatness consists in his being there.

The law is the witness and external deposit of our moral life. Its history is the history of the moral development of the race.

Life is painting a picture, not doing a sum.

Young man, the secret of my success is that an early age I discovered that I was not God.