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

Failure to prepare = preparing to fail

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

Time is your friend, impulse is your enemy.

Your attitude is everything. Pick a good one.

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

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 master has failed more times than the beginner has even tried

If you want to succeed, double your failure rate.

There are no bad mistakes in maths, only discoveries.

Work ethic is important, because, unlike intelligence, athleticism, or charisma, or any natural attribute, it’s a choice.

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

Just stick with it, what seems hard now will one day be your warm up.

1.00³⁶⁵=1 and 1.01³⁶⁵=37.7. Doing nothing at all versus small steps at a time. 

I can is 100 times more important than IQ.