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. 

Time is your friend, impulse is your enemy.

Failure to prepare = preparing to fail

There are no bad mistakes in maths, only discoveries.

I can is 100 times more important than IQ.

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

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.

I think, therefore I am.

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

The temptation to quit will be the greatest when you are about to succeed

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

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

It is never too late to turn an unproductive day into a productive one.

Skills are built not born.