Things do not happen. Things are made to happen.
Be gentle to all and stern with yourself.
It's always too early to quit.
To be a good loser is to learn how to win.
Wherever you are - be all there.
The most effective way to do it, is to do it.
Always desire to learn something useful.
Know or listen to those who know.
The dog that trots about finds a bone.
If you're going through hell, keep going.
I think space will be conquered through the mind rather than the clumsy medium of space travel.