I am conscious of my inability to grasp, in all its details and positive developments, any very large portion of human knowledge.

Political Freedom without economic equality is a pretense, a fraud, a lie; and the workers want no lying.

From the naturalistic point of view, all men are equal. There are only two exceptions to this rule of naturalistic equality: geniuses and idiots.

A jealous lover of human liberty, deeming it the absolute condition of all that we admire and respect in humanity, I reverse the phrase of Voltaire, and say that, if God really existed, it would be necessary to abolish him.

Even the most wretched individual of our present society could not exist and develop without the cumulative social efforts of countless generations.

I listen to them freely and with all the respect merited by their intelligence, their character, their knowledge, reserving always my incontestable right of criticism and censure.

Idealism is the despot of thought, just as politics is the despot of will.