“The two most important days in your life are the day you are born and the day you find out why.”

All boundaries are conventions. One may transcend any convention if only one can first conceive of doing so.

To be is to do.

I'd rather regret the things that I have done than the things that I have not done.

Nothing could be worse than the fear that one had given up too soon, and left one unexpended effort that might have saved the world.

“If you can’t explain it simply, you don’t understand it well enough.”

Think of all the beauty still left around you and be happy.