The journey of a thousand miles begins with one step. 

I think, therefore I am.

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

Time is your friend, impulse is your enemy.

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

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

Hard work beats talent when talent doesn't work hard.

Tough times never last, but tough people do.

Hard work - a two way street where you get exactly what you put in.

Mistakes have the power to turn you into something better than you were before.

If you want to succeed, double your failure rate.

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

You can have results or excuses, not both

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

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