Knowledge is power only if man knows what facts not to bother with.

Knowledge is power only if man knows what facts not to bother with.

Any of us can achieve virtue, if by virtue we merely mean the avoidance of the vices that do not attract us.

I sometimes suspect that half our difficulties are imaginary and that if we kept quiet about them they would disappear.

Most of us can remember a time when a birthday - especially if it was one's own - brightened the world as if a second sun has risen.

[History is] the story of the magnificent rear-guard action fought during several thousand years by dogma against curiosity.

Most of us believe in trying to make other people happy only if they can be happy in ways which we approve.