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

Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

There is no substitute for hard work.

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

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

If you carve without ceasing, even metal and stone can be engraved.

-- Xunzi

If you are born poor it's not your mistake, but if you die poor it's your mistake.

-- Bill Gates

Make an effort that yields to no one.

-- Kazuo Inamori

I never dreamed about success. I worked for it.

-- Estée Lauder

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

-- Ray Kroc

Rule No. 1: Never lose money. Rule No. 2: Never forget Rule No. 1.

-- Warren Buffett