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. 

99% of genius comes from hard work, the remaining 1% comes from innate talent

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.

If you fail, next time fail better.

You can hire a tutor but you can't hire someone to practice for you.

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

You cannot escape the responsibility of tomorrow by evading it today

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

Start, struggle, fail, fix and learn. Repeat.

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

Twenty years from now you will be more disappointed by the things you didn’t do than the things you did do

Do what you have always done and you will always be what you have always been

Nobody said it’d be easy, they just promised it would be worth it.

Tough times never last, but tough people do.

We learn more from failure than we do from success.