If there are one hundred thousand damned souls for one saved soul, the devil has always the advantage without having given up his son to death.

If reason be a gift of Heaven, and we can say as much of faith, Heaven has certainly made us two gifts not only incompatible, but in direct contradiction to each other. In order to solve the difficulty, we are compelled to say either that faith is a chimera or that reason is useless.

The Christian religion teaches us to imitate a God that is cruel, insidious, jealous, and implacable in his wrath.

Fanaticism is just one step away from barbarism.

Instinct guides the animal better than the man. In the animal it is pure, in man it is led astray by his reason and intelligence.

Time, matter, space - all, it may be, are no more than a point.

Whether God exists or does not exist, He has come to rank among the most sublime and useless truths.