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 boxer is not afraid of being knocked down, he is afraid of not being able to get up again.

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

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

Never underestimate the importance of small steps. small steps = big changes. 

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

Don't be afraid to take an unfamiliar path.  Sometimes they're the ones that lead you to the best places.

Time is your friend, impulse is your enemy.

Good mathematics is not about how many answers you know... It is about how you behave when you don't know.

You'll never change your life until you change something you do daily. The secret to success and change in found in your daily routine.

The greatest enemy to human potential is your comfort zone

It doesn’t matter where you start, it matters how you end

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

Fall down seven times, stand up eight.

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