A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.

I learned not to worry so much about the outcome, but to concentrate on the step I was on and to try to do it as perfectly as I could when I was doing it.

To be successful, you have to have your heart in your business, and your business in your heart.

You may be disappointed if you fail, but you are doomed if you don’t try.

A wise man learns by the mistakes of others, a fool by his own.

Openly share and talk to people about your idea. Use their lack of interest or doubt to fuel your motivation to make it happen.

The successful man is the one who finds out what is the matter with his business before his competitors do.

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

If you want one year of prosperity, grow grain. If you want ten years of prosperity, grow trees. If you want one hundred years of prosperity, grow people.

The diamond cannot be polished without friction, nor the man perfected without trials.

The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.

Nothing will work unless you do.

Life can be pulled by goals just as surely as it can be pushed by drives.

Assume you have 90 seconds with a new user before they decide to use your app or delete it.

In everything the ends well defined are the secret of durable success.