Many of life’s failures are people who did not realize how close they were to success when they gave up.

The first requisite for success is the ability to apply your physical and mental energies to one problem incessantly without growing weary.

Show me a thoroughly satisfied man and I will show you a failure.

If we did all the things that we are capable of doing, we would literally astound ourselves.

Genius is one per cent inspiration, ninety-nine per cent perspiration.

For most of my life I refused to work at any problem unless its solution seemed to be capable of being put to commercial use.

There’s a way to do it better—find it.