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

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

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

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

Failure to prepare = preparing to fail

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

Don’t compare yourself to others. Compare yourself to the person you were yesterday.

Lose an hour in the morning and you will spend all day looking for it.

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

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.

No one starts out on top. You have to work your way up.

Failure is not the opposite of success, it is part of the success.

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.

A book a day keeps the stupidity away.

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