Lend your friend $20. If he doesn’t pay you back then he’s not your friend. Money well spent.

Don’t be trapped by dogma

It’s easier to ask forgiveness than it is to get permission

A jade stone is useless before it is processed; a man is good-for-nothing until he is educated.

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

A journey of a thousand miles begins with a single step.

There is only one success

If you ain’t making waves, you ain’t kickin’ hard enough

The surest way not to fail is to determine to succeed.

If you’re not embarrassed by the first version of your product, you’ve launched too late.

Don't waste your life in doubts and fears: Spend yourself on the work before you, well assured that the right performance of this hour's duties will be the best preparation for the hours or ages that follow it.

Building a castle is difficult. Defending and maintaining it is harder still.

It is never too late to be what you might have been.

I never perfected an invention that I did not think about in terms of the service it might give others… I find out what the world needs, then I proceed to invent.

Associate yourself with people of good quality, for it is better to be alone than in bad company

The biggest failure you can have in life is not trying at all.

Never, never, never, never, in nothing great or small, large or petty, never give in except to convictions of honour and good sense. Never yield to force; never yield to the apparently overwhelming might of the enemy.

Lend your friend $20. If he doesn’t pay you back then he’s not your friend. Money well spent.