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.

Be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.

The greatest enemy to human potential is your comfort zone

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

Everything you want is on the other side of fear

The wise person knows that no answer is also an answer

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

We learn more from failure than we do from success.

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

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

Your limitation - its only your imagination.

The easiest person to deceive is yourself.

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

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

Tough times never last, but tough people do.