And when you cannot prove that people are wrong, but only that they are absurd, the best course is to let them alone.

Proclaim human equality as loudly as you like, Witless will serve his brother.

Science reckons many prophets, but there is not even a promise of a Messiah.

Science is organized common sense where many a beautiful theory was killed by an ugly fact.

In truth, the laboratory is the forecourt of the temple of philosophy, and whoso has not offered sacrifices and undergone purification there has little chance of admission into the sanctuary.

The quarrels of theologians and philosophers have not been about religion, but about philosophy; and philosophers not unfrequently seem to entertain the same feeling toward theologians that sportsmen cherish toward poachers.

The foundation of morality is to have done, once and for all, with lying.