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. 

Everything you want is on the other side of fear

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.

Success can never happen without the journey (struggle).

Your attitude is everything. Pick a good one.

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

Don’t confuse your path with your destination. Just because its stormy now doesn’t mean you are headed for failure.

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

A book a day keeps the stupidity away.

Work on your weaknesses until they are your strengths and work on your strengths until they are second nature.

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

Success is a journey, not a destination.

FAIL - First Attempt In Learning

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.

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