nd now that man's history has been for the first time systematically considered as a whole, and has been found to be, like all other phenomena, subject to invariable laws, the preparatory labours of modern Science are ended.

Every science consists in the coordination of facts; if the different observations were entirely isolated, there would be no science.

If we do not allow free thinking in chemistry or biology, why should we allow it in morals or politics?

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

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

Language forms a kind of wealth, which all can make use of at once without causing any diminution of the store, and which thus admits a complete community of enjoyment; for all, freely participating in the general treasure, unconsciously aid in its preservation.

Religion is an illusion of childhood, outgrown under proper education.