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. 

The boxer is not afraid of being knocked down, he is afraid of not being able to get up again.

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

Dreams don't work unless you do.

Try and do one thing each day that you would really rather not do.

We learn more from failure than we do from success.

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

A book a day keeps the stupidity away.

Tomorrow is worth more than yesterday but less than today.

There is great wisdom in being able to realise that you don’t understand something before it goes too far.

99% of genius comes from hard work, the remaining 1% comes from innate talent

The journey of a thousand miles begins with one step. 

I have not failed, I've just found 10,000 ways that won't work.

The greatest mistake we make is living in constant fear that we will make one.

If you really want something you’ll find a way. If you don’t you’ll find an excuse.