Whatever the mind of man creates, should be controlled by man's character.

Work while others are wishing.

The three things that are most essential to achievement are common sense, hard work and stick-to-it-iv-ness.

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

Be courageous. I have seen many depressions in business. Always America has emerged from these stronger and more prosperous. Be brave as your fathers before you. Have faith! Go forward!

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

Of the 200 light bulbs that didn't work, every failure told me something that I was able to incorporate into the next attempt.