To do much clear thinking a person must arrange for regular periods of solitude when they can concentrate and indulge the imagination without distraction.

There is no limit to which a man will not go to avoid thinking.

The trouble with most people is that they quit before they start.

The man who doesn't make up his mind to cultivate the habit of thinking misses the greatest pleasure in life.

What makes a song last is real content from a mind that is thinking a little bit harder about certain things. A lot of artists don't really think that hard.

Thinking isn't agreeing or disagreeing. That's voting.