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

He who has begun his task is half-way done. Have the courage to begin!

Failure to prepare = preparing to fail

Whenever you find yourself doubting how far you can go, just remember how far you have come.

Don’t hang your targets after you’re done shooting.

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

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

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 think, therefore I am.

Your limitation - its only your imagination.

We all have two lives. The second begins when we realise we only have one. 

Don’t practice until you get it right, practice until you can’t get it wrong.

No one starts out on top. You have to work your way up.

The greatest mistake we make is living in constant fear that we will make one.

Success can never happen without the journey (struggle).