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

Tough times never last, but tough people do.

The journey of a thousand miles begins with one step. 

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

Procrastination makes easy things hard and hard things harder.

In order to become better than anybody else you must first become better than yourself.

You cannot escape the responsibility of tomorrow by evading it today

It always seems impossible until it's done.

Whenever you find yourself doubting how far you can go, just remember how far you have come.

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

Don’t compare yourself to others. Compare yourself to the person you were yesterday.

Mathematics Is not a spectator sport. The only way to learn mathematics is to do mathematics.

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

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

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