I have not failed. I've just found 10,000 ways that won't work.

There is no substitute for hard work.

Opportunity is missed by most people because it is dressed in overalls and looks like work.

Genius is one percent inspiration and ninety-nine percent perspiration.

I never did anything by accident, nor did any of my inventions come by accident; they came by work.

A man who dares to waste one hour of time has not discovered the value of life.

-- Charles Darwin

The person who studies three, four, five times harder than anyone else -- that is a genius.

-- Hideyo Noguchi

Luck is a dividend of sweat. The more you sweat, the luckier you get.

-- Ray Kroc

Early to bed and early to rise, makes a man healthy, wealthy, and wise.

-- Benjamin Franklin

Diligence is the mother of good luck.

-- Benjamin Franklin

Do your duty and a little more, and the future will take care of itself.

-- Andrew Carnegie