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. 

Failure to prepare = preparing to fail

It doesn’t matter where you start, it matters how you end

You cannot escape the responsibility of tomorrow by evading it today

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

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

Failure is not the opposite of success, it is part of the success.

Each day is an opportunity to improve. Aim to be that little bit better than yesterday and better tomorrow than today.

Nobody said it’d be easy, they just promised it would be worth it.

Dreams don't work unless you do.

You can have results or excuses, not both

The greatest enemy to human potential is your comfort zone

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

Everything you want is on the other side of fear

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