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

Cut quarrels out of literature, and you will have very little history or drama or fiction or epic poetry left.

When the last Puritan has disappeared from the earth, the man of science will take his place as a killjoy, and we shall be given the same old advice but for different reasons.

Most remarks that are worth making are commonplace remarks. The things that makes them worth saying is that we really mean them.

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

Every man of genius is considerably helped by being dead.

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