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. 

Fall down seven times, stand up eight.

We learn more from failure than we do from success.

Focus on progress, not perfection. Practise a little bit every day - little and often  Slow and steady wins the race.

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.

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

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

You can have results or excuses, not both

I can is 100 times more important than IQ.

In order to become better than anybody else you must first become better than yourself.

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

If you fail, next time fail better.

The wise person knows that no answer is also an answer

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

1.00³⁶⁵=1 and 1.01³⁶⁵=37.7. Doing nothing at all versus small steps at a time.