“A wise man proportions his belief to the evidence.”

Beauty in things exists in the mind which contemplates them.

Reason is, and ought only to be, the slave of the passions.

Custom is the great guide of human life.

Truth springs from argument amongst friends.

All action results from thought, so it is thoughts that matter.

An optimist is a person who sees a green light everywhere, while the pessimist sees only the red spotlight... The truly wise person is colour-blind.

We cannot solve our problems with the same thinking we used when we created them.

What a wretched custom — the man who could not get even a rag to cover his body while alive must be given a new shroud when he is dead.