Don't put off until tomorrow what you can do today. If today you have no time, it means tomorrow you'll be too tired and the next day you'll be something else.

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

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

Practice makes comfort. Expand your experiences regularly so every stretch won't feel like your first.

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

You can hire a tutor but you can't hire someone to practice for you.

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.

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

Success is a journey, not a destination.

I have not failed, I've just found 10,000 ways that won't work.

Tough times never last, but tough people do.

Fall down seven times, stand up eight.

The journey of a thousand miles begins with one step. 

I can is 100 times more important than IQ.