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

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.

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

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

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

The master has failed more times than the beginner has even tried

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

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

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

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

If you can understand just one thing thoroughly, then you will understand everything.

The greatest enemy to human potential is your comfort zone

A hero is no braver than an ordinary man, but he is braver five minutes longer.

Yesterday is history, tomorrow is a mystery, but today is a gift—that's why it's called 'the present