Without a doubt the greatest injury of all was done by basing morals on myth. For, sooner or later, myth is recognized for what it is, and disappears. Then morality loses the foundation on which it has been built.

There is something Pagan in me that I cannot shake off. In short, I deny nothing, but doubt everything.

I have no doubt that the threshold [of suffering] may be crossed if a late applicant with no means and no alternative sources of support, unable to support himself is, by deliberate action of the state, denied shelter, food or the most basic necessities of life.

There lives more faith in honest doubt, Believe me, than in half the creeds.

I've stood upon Achilles' tomb, And heard Troy doubted: time will doubt of Rome

I have no doubt that mothers in America use my name to frighten their children into finishing their vegetables.