The law of liberty tends to abolish the reign of race over race, of faith over faith, of class over class. It is not the realisation of a political ideal: it is the discharge of a moral obligation.

Before God, there is neither Greek nor barbarian, neither rich nor poor, and the slave is as good as his master, for by birth all men are free; they are citizens of the universal commonwealth which embraces all the world, brethren of one family, and children of God.

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.

History is not only a particular branch of knowledge, but a particular mode and method of knowledge in other branches.

Machiavelli's teaching would hardly have stood the test of Parliamentary government, for public discussion demands at least the profession of good faith.

A wise person does at once, what a fool does at last. Both do the same thing; only at different times.

There is no error so monstrous that it fails to find defenders among the ablest men.