The wise person knows that no answer is also an answer

Never underestimate the importance of small steps. small steps = big changes. 

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

Fall down seven times, stand up eight.

Nothing is impossible if you want it badly enough. Impossible = I'm possible.

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

The greatest enemy to human potential is your comfort zone

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

Run in the morning before your body figures out what you're doing

We learn more from failure than we do from success.

Don't expect to be good at maths or understand things straight away. Be patient and persistent. Rome wasn't built in a day, but they worked on it every single day. 

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

I can is 100 times more important than IQ.

There are no bad mistakes in maths, only discoveries.

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