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

There are no bad mistakes in maths, only discoveries.

Procrastination makes easy things hard and hard things harder.

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

We learn more from failure than we do from success.

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

Nobody said it’d be easy, they just promised it would be worth it.

Time is your friend, impulse is your enemy.

Fall down seven times, stand up eight.

Try and do one thing each day that you would really rather not do.

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.

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

The greatest enemy to human potential is your comfort zone

The road to success is like a staircase. If you want to succeed, double your failure rate