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. 

I can is 100 times more important than IQ.

If you fail, next time fail better.

The greatest glory in loving lies not in never falling, but in rising every time we fall.

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

Time is your friend, impulse is your enemy.

Tough times never last, but tough people do.

Run in the morning before your body figures out what you're doing

Failure to prepare = preparing to fail

Everything you want is on the other side of fear

Instead of finding reasons why you can't, find reasons why you can.

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

Success is not final, failure is not fatal.  It is the courage to continue that counts.

Go as far as you can see, when you get there, you’ll be able to see further

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