Vanity of science. Knowledge of physical science will not console me for ignorance of morality in time of affliction, but knowledge of morality will always console me for ignorance of physical science.

The last act is bloody, however pleasant all the rest of the play is: a little earth is thrown at last upon our head, and that is the end forever.

The war existing between the senses and reason.

Reason commands us far more imperiously than a master; for in disobeying the one we are unfortunate, and in disobeying the other we are fools.

The sum of a man's problems come from his inability to be alone in a silent room.

Small minds are concerned with the extraordinary, great minds with the ordinary.

There are two equally dangerous extremes-to shut reason out, and to let nothing else in.