Don’t practice until you get it right, practice until you can’t get it wrong.

Work ethic is important, because, unlike intelligence, athleticism, or charisma, or any natural attribute, it’s a choice.

Success is not final and failure is not fatal. It is the courage to continue that counts.

99% of failures come from people who have the habit of making excuses.

Failure is not the opposite of success, it is part of the success.

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

If you want to succeed, double your failure rate.

No one starts out on top. You have to work your way up.

Never let a dark chapter make you forget that better days are ahead of you. Your story is far from over.

Don’t hang your targets after you’re done shooting.

It always seems impossible until it's done.

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

A book a day keeps the stupidity away.

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

Good mathematics is not about how many answers you know... It is about how you behave when you don't know.