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

A hero is no braver than an ordinary man, but he is braver five minutes longer.

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

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

It is never too late to become what you might have been

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

Everything you want is on the other side of fear

Success can never happen without the journey (struggle).

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

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

The bad news is time flies, the good new is that you're the pilot.

I can is 100 times more important than IQ.

Failure to prepare = preparing to fail

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

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