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

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

I think, therefore I am.

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

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

We learn more from failure than we do from success.

Your limitation - its only your imagination.

Good mathematics is not about how many answers you know... It is about how you behave when you don't know.

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

We all make mistakes. What matters is how we choose to move forwards from them.

Procrastination is the thief of time and the enemy of success.

Pure mathematics is in its way, the poetry of logical ideas.

Skills are built not born.

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

A hero is no braver than an ordinary man, but he is braver five minutes longer.