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

I think, therefore I am.

There are no shortcuts to any place worth going.

A book a day keeps the stupidity away.

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

It is never too late to become what you might have been

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. 

Hard work always pays off - it is not a question of if you will get there, but WHEN you will get there

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

Don't fear failure, fear being in the same exact same place next year as you are now.

I can is 100 times more important than IQ.

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

It always seems impossible until it's done.

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

It is never too late to turn an unproductive day into a productive one.