The boxer is not afraid of being knocked down, he is afraid of not being able to get up again.

Success can never happen without the journey (struggle).

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

Whenever you find yourself doubting how far you can go, just remember how far you have come.

Don’t be afraid to work hard and find out how good you can really be.

The power of reflection is the most powerful skill you’ll learn.

You can pick up a mistake and carry it as a burden,  or you can set it down as use it as a stepping stone to greatness.

You can have results or excuses, not both

If you can understand just one thing thoroughly, then you will understand everything.

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

There is no talent here. There is hard work and obsession. You could be anyone if you put in the time.

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

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

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

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