Faith: a firm belief for which there is no evidence.

It is not by delusion, however exalted, that mankind can prosper, but only by unswerving courage in the pursuit of truth.

Religions that teach brotherly love have been used as an excuse for persecution, and our profoundest scientific insight is made into a means of mass destruction.

Punctuality is a quality the need of which is bound up with social co-operation.

Neither acquiescence in skepticism nor acquiescence in dogma is what education should produce.

Italy, and the spring and first love all together should suffice to make the gloomiest person happy.

I am compelled to fear that science will be used to promote the power of dominant groups rather than to make men happy.