Nothing is destroyed until it is replaced.

The word right should be excluded from political language, as the word cause from the language of philosophy.

To understand a science it is necessary to know its history.

The sacred formula of positivism: love as a principle, the order as a foundation, and progress as a goal.

Positivism is a theory of knowledge according to which the only kind of sound knowledge available to human kind is that if science grounded in observation.

But now, I, August Comte, have discovered the truth. Therefore, there is no longer any need for freedom of thought or freedom of the press. I want to rule and to organize the whole country.

In mathematics we find the primitive source of rationality; and to mathematics must the biologists resort for means to carry out their researches.