Nothing is impossible if you want it badly enough. Impossible = I'm possible.

It always seems impossible until it's done.

There is no elevator to success, you have to take the stairs.

There are no bad mistakes in maths, only discoveries.

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

The journey of a thousand miles begins with one step. 

Instead of finding reasons why you can't, find reasons why you can.

Fall down seven times, stand up eight.

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

Life is full of opportunities. With every opportunity that is missed, another one is born.

I think, therefore I am.

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

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

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

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