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. 

I think, therefore I am.

I can is 100 times more important than IQ.

We learn more from failure than we do from success.

Skills are built not born.

There are no shortcuts to any place worth going.

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

Success is a journey, not a destination.

Procrastination makes easy things hard and hard things harder.

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

The journey of a thousand miles begins with one step. 

Don't put off until tomorrow what you can do today. If today you have no time, it means tomorrow you'll be too tired and the next day you'll be something else.

You cannot escape the responsibility of tomorrow by evading it today

The greatest glory in loving lies not in never falling, but in rising every time we fall.

Don't be afraid to take an unfamiliar path.  Sometimes they're the ones that lead you to the best places.