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

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

I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times.

Tough times never last, but tough people do.

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

Skills are built not born.

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

The road to success is like a staircase. If you want to succeed, double your failure rate

Time is your friend, impulse is your enemy.

If you really want something you’ll find a way. If you don’t you’ll find an excuse.

Do Not Be Afraid To Make Mistakes. Each mistake teaches us something.

Hard work - a two way street where you get exactly what you put in.

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

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