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.

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.

Friendship is not going to stand the pressure of greatly great guidance for quite extensive.

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

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.