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

There are no bad mistakes in maths, only discoveries.

Success is a journey, not a destination.

The wise person knows that no answer is also an answer

I think, therefore I am.

Procrastination makes easy things hard and hard things harder.

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

Success is not final and failure is not fatal. It is the courage to continue that counts.

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

You're not in competition with anyone but yourself. Outdo your past, not other people.

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

In order to become better than anybody else you must first become better than yourself.

We learn more from failure than we do from success.

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

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