I can, therefore I am.
You never know what motivates you.
To know oneself, one should assert oneself.
Never complain and never explain.
Wherever you are - be all there.
Always desire to learn something useful.
Be gentle to all and stern with yourself.
What you do today can improve all your tomorrows.
Expect problems and eat them for breakfast.
To be a good loser is to learn how to win.
I think space will be conquered through the mind rather than the clumsy medium of space travel.