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. 

You can have results or excuses, not both

I can is 100 times more important than IQ.

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.

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

Dreams don't work unless you do.

Never let a dark chapter make you forget that better days are ahead of you. Your story is far from over.

Tough times never last, but tough people do.

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

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

When you make a mistake, take another chance. Only when you choose not to do so do you fail.

Mistakes have the power to turn you into something better than you were before.

Your limitation - its only your imagination.

The journey of a thousand miles begins with one step.

No matter how bad it gets, you’re still way ahead of those who haven’t even started.