We all have two lives. The second begins when we realise we only have one. 

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.

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

Don't expect to be good at maths or understand things straight away. Be patient and persistent. The most powerful warriors are patience and time.

Good mathematics is not about how many answers you know... It is about how you behave when you don't know.

Don’t compare yourself to others. Compare yourself to the person you were yesterday.

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

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

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

The road to success is like a staircase. If you want to succeed, double your failure rate

Go as far as you can see, when you get there, you’ll be able to see further

No one starts out on top. You have to work your way up.

You can be shown the path, but only you can make the first step.

Tomorrow is worth more than yesterday but less than today.

Do what you have always done and you will always be what you have always been