The science of politics is the one science that is deposited by the streams of history, like the grains of gold in the sand of a river; and the knowledge of the past, the record of truths revealed by experience, is eminently practical, as an instrument of action and a power that goes to making the future.

To develop and perfect and arm conscience is the great achievement of history.

A public man has no right to let his actions be determined by particular interests. He does the same thing as a judge who accepts a bribe. Like a judge he must consider what is right, not what is advantageous to a party or class.

It is they [men of science] who hold the secret of the mysterious property of the mind by which error ministers to truth, and truth slowly but irrevocably prevails. Theirs is the logic of discovery, the demonstration of the advance of knowledge and the development of ideas, which as the earthly wants and passions of men remain almost unchanged, are the charter of progress, and the vital spark in history.

Liberty is the prevention of control by others.

The test of liberty is the position and security of minorities.

Everybody likes to get as much power as circumstances allow, and nobody will vote for a self-denying ordinance.