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

Mathematics Is not a spectator sport. The only way to learn mathematics is to do mathematics.

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

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

Hard work beats talent when talent doesn't work hard.

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

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

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

Life is full of opportunities. With every opportunity that is missed, another one is born.

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

Success is the sum of small repeated efforts, day in and day out.

The journey of a thousand miles begins with one step.

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.

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

Fall down seven times, stand up eight.