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.

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

The best thinking has been done in solitude. The worst has been done in turmoil.

High thinking is inconsistent with a complicated material life based on high speed and imposed on us by mammon worship.

Thinking is the capital, Enterprise is the way, Hard Work is the solution