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

Work on your weaknesses until they are your strengths and work on your strengths until they are second nature.

Dreams don't work unless you do.

Failure to prepare = preparing to fail

In order to become better than anybody else you must first become better than yourself.

Knowledge is of no value unless you put it into practice.

I think, therefore I am.

When you make a mistake, take another chance. Only when you choose not to do so do you fail.

The temptation to quit will be the greatest when you are about to succeed

Pure mathematics is in its way, the poetry of logical ideas.

Yesterday is history, tomorrow is a mystery, but today is a gift—that's why it's called 'the present

You can hire a tutor but you can't hire someone to practice for you.

The journey of a thousand miles begins with one step.

Mistakes have the power to turn you into something better than you were before.

Success is a journey, not a destination.