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. 

It is never too late to become what you might have been

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

I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times.

We learn more from failure than we do from success.

"I" not them. Be the best version of you.

If you fail, next time fail better.

The power of reflection is the most powerful skill you’ll learn.

A hero is no braver than an ordinary man, but he is braver five minutes longer.

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

You're not in competition with anyone but yourself. Outdo your past, not other people.

Failure is NOT your destiny. Failure is the key to success.

You cannot start the next chapter of your life if you keep re-reading the last one.

I think, therefore I am.

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.