Failure is not the opposite of success, it is part of the success.

You cannot escape the responsibility of tomorrow by evading it today

Fall down seven times, stand up eight.

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. 

There is no elevator to success, you have to take the stairs.

The greatest enemy to human potential is your comfort zone

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

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

There are no shortcuts to any place worth going.

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

Work on your weaknesses until they are your strengths and work on your strengths until they are second nature.

Success is a journey, not a destination.

Don't be afraid to take an unfamiliar path.  Sometimes they're the ones that lead you to the best places.

Knowledge is of no value unless you put it into practice.

If you can understand just one thing thoroughly, then you will understand everything.