The dog that trots about finds a bone.
If you're going through hell, keep going.
To be a good loser is to learn how to win.
Be thine own palace, or the world's thy jail.
What you do today can improve all your tomorrows.
If you think you can do it, you can.
Either you run the day or the day runs you.
Go for it now. The future is promised to no one.
To know oneself, one should assert oneself.
Know or listen to those who know.
Science fiction is an amazing literature: plot elements that you would think would be completely worn out by now keep changing into surprising new forms.