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

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

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

Pure mathematics is in its way, the poetry of logical ideas.

The greatest enemy to human potential is your comfort zone

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

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

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

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

Practice like you’ve never won. Perform like you’ve never lost.

Knowledge is of no value unless you put it into practice.

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.

Don’t practice until you get it right, practice until you can’t get it wrong.

A book a day keeps the stupidity away.

Tough times never last, but tough people do.