Try and do one thing each day that you would really rather not do.

Failure to prepare = preparing to fail

There are no bad mistakes in maths, only discoveries.

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.

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

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

Success is not final, failure is not fatal.  It is the courage to continue that counts.

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

The bad news is time flies, the good new is that you're the pilot.

The greatest enemy to human potential is your comfort zone

Don't fear failure, fear being in the same exact same place next year as you are now.

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

Yesterday is history, tomorrow is a mystery, but today is a gift—that's why it's called 'the present

It always seems impossible until it's done.

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