Every man of genius is considerably helped by being dead.

Friendship will not stand the strain of very much good advice for very long.

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

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

One of the greatest joys known to man is to take a flight into ignorance in search of knowledge.

Every man of genius is considerably helped by being dead.

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