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

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

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.

Tough times never last, but tough people do.

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

Nothing is impossible if you want it badly enough. Impossible = I'm possible.

There are no shortcuts to any place worth going.

Failure to prepare = preparing to fail

There are no bad mistakes in maths, only discoveries.

If you can understand just one thing thoroughly, then you will understand everything.

Twenty years from now you will be more disappointed by the things you didn’t do than the things you did do

He who has begun his task is half-way done. Have the courage to begin!

99% of genius comes from hard work, the remaining 1% comes from innate talent

We all have two lives. The second begins when we realise we only have one. 

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