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

The temptation to quit will be the greatest when you are about to succeed

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

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.

The greatest enemy to human potential is your comfort zone

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

There are no shortcuts to any place worth going.

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

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

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

There are no bad mistakes in maths, only discoveries.

Everything you want is on the other side of fear

You're not in competition with anyone but yourself. Outdo your past, not other people.

Each day is an opportunity to improve. Aim to be that little bit better than yesterday and better tomorrow than today.

It always seems impossible until it's done.