You're not in competition with anyone but yourself. Outdo your past, not other people.

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.

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

I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times.

Don't put off until tomorrow what you can do today. If today you have no time, it means tomorrow you'll be too tired and the next day you'll be something else.

Don’t compare yourself to others. Compare yourself to the person you were yesterday.

The master has failed more times than the beginner has even tried

The bad news is time flies, the good new is that you're the pilot.

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

Time is your friend, impulse is your enemy.

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

Work like you don't need the money, dance like nobody's watching and love like you've never been hurt. 

Hard work beats talent when talent doesn't work hard.

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