99% of failures come from people who have the habit of making excuses.

Everything you want is on the other side of fear

There are no bad mistakes in maths, only discoveries.

I think, therefore I am.

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

Do what you have always done and you will always be what you have always been

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

Go as far as you can see, when you get there, you’ll be able to see further

You can pick up a mistake and carry it as a burden,  or you can set it down as use it as a stepping stone to greatness.

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

Everything that happens was once a dream.

The power of reflection is the most powerful skill you’ll learn.

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

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

Focus on progress, not perfection. Practise a little bit every day - little and often  Slow and steady wins the race.