It has always surprised me how little attention philosophers have paid to humor, since it is a more significant process of mind than reason. Reason can only sort out perceptions, but the humor process is involved in changing them.

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

If you never change your mind, why have one?

The effective thinker treats arrogance as the major sin of thinking.

Removing the faults in a stage-coach may produce a perfect stage-coach, but it is unlikely to produce the first motor car.

If you wait for opportunities to occur, you will be one of the crowd.

The simple process of focusing on things that are normally taken for granted is a powerful source of creativity.