I think, therefore I am.

The greatest mistake we make is living in constant fear that we will make one.

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

Don't expect to be good at maths or understand things straight away. Be patient and persistent. Rome wasn't built in a day, but they worked on it every single day. 

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

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

Knowledge is of no value unless you put it into practice.

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

Time is your friend, impulse is your enemy.

Everything you want is on the other side of fear

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

If you fail, next time fail better.

1.00³⁶⁵=1 and 1.01³⁶⁵=37.7. Doing nothing at all versus small steps at a time. 

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

There are no shortcuts to any place worth going.