We all have two lives. The second begins when we realise we only have one. 

Success is the sum of small repeated efforts, day in and day out.

Failure to prepare = preparing to fail

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

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

Dreams don't work unless you do.

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.

Mathematics Is not a spectator sport. The only way to learn mathematics is to do mathematics.

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

Fall down seven times, stand up eight.

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

Be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.

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

There is no elevator to success, you have to take the stairs.

The journey of a thousand miles begins with one step.