You can pick up a mistake and carry it as a burden,  or you can set it down as use it as a stepping stone to greatness.

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

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

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

Everything that happens was once a dream.

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

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

Your limitation - its only your imagination.

Time is your friend, impulse is your enemy.

Run in the morning before your body figures out what you're doing

Failure is not the opposite of success, it is part of the success.

Success is a journey, not a destination.

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

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

Skills are built not born.