Never underestimate the importance of small steps. small steps = big changes. 

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

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

Work ethic is important, because, unlike intelligence, athleticism, or charisma, or any natural attribute, it’s a choice.

He who has begun his task is half-way done. Have the courage to begin!

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.

I think, therefore I am.

Success is a journey, not a destination.

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

If you want to succeed, double your failure rate.

Everything you want is on the other side of fear

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

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

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

Your limitation - its only your imagination.