There are no bad mistakes in maths, only discoveries.

The wise person knows that no answer is also an answer

Fall down seven times, stand up eight.

You cannot escape the responsibility of tomorrow by evading it today

Skills are built not born.

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

If you fail, next time fail better.

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

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

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

Success can never happen without the journey (struggle).

Shoot for the moon and even if you miss you’ll land among the stars/

Don't fear failure, fear being in the same exact same place next year as you are now.

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

Do Not Be Afraid To Make Mistakes. Each mistake teaches us something.