Whenever you find yourself doubting how far you can go, just remember how far you have come.

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. 

Be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.

It always seems impossible until it's done.

There are no bad mistakes in maths, only discoveries.

Don’t hang your targets after you’re done shooting.

He who has begun his task is half-way done. Have the courage to begin!

If you can understand just one thing thoroughly, then you will understand everything.

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

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

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

Nothing is impossible if you want it badly enough. Impossible = I'm possible.

Everything you want is on the other side of fear

Just stick with it, what seems hard now will one day be your warm up.

Dreams don't work unless you do.