Nothing is destroyed until it is replaced.

All good intellects have repeated, since Bacon's time, that there can be no real knowledge but which is based on observed facts.

The only real life is the collective life of the race; individual life has no existence except as an abstraction.

Woman is the most moral element in all humanity.

To reorganize society without God or King, by the systematic culture of Humanity.

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

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.