One can have no smaller or greater mastery than mastery of oneself.

If you wish success in life, make perseverance your bosom friend, experience your wise counselor, caution your elder brother and hope your guardian genius.

The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather a lack in will.

Take time to deliberate, but when the time for action comes, stop thinking and go in.

The superior man understands what is right; the inferior man understands what will sell.

Develop success from failures. Discouragement and failure are two of the surest stepping stones to success.

To invent, you need a good imagination and a pile of junk.

Percentages are why I am rich.

Only put off until tomorrow what you are willing to die having left undone

I've always thought anyone can make money. Making a life worth living, that's the real test.

You reach a point where you don't work for money.

Old Professors never die, they just lose their faculties.

I never pick up an item without thinking of how I might improve it.

Don't be afraid to give your best to what seemingly are small jobs. Every time you conquer one it makes you that much stronger. If you do the little jobs well, the big ones will tend to take care of themselves.

If you treat people right they will treat you right - ninety percent of the time.

Boredom is one of the most blissful feelings.

Pleasure in the job puts perfection in the work.

There is one weakness in people for which there is no remedy. It is the universal weakness of lack of ambition.

The secret of success is constancy to purpose.

Art calls for complete mastery of techniques, developed by reflection within the soul.

Lisa, if you don't like your job you don't strike. You just go in every day and do it really half-assed. That's the American way.