It's always too early to quit.
If you can dream it, you can do it.
Only the educated are free.
Know or listen to those who know.
To be a good loser is to learn how to win.
Always desire to learn something useful.
What you do today can improve all your tomorrows.
Be thine own palace, or the world's thy jail.
Well done is better than well said.
The secret of getting ahead is getting started.
I think that somebody with the resources and innovation and the idea is going to come out of nowhere and come up with a successful space travel program.