What you do today can improve all your tomorrows.
I can, therefore I am.
Who seeks shall find.
It's always too early to quit.
Be kind whenever possible. It is always possible.
Things do not happen. Things are made to happen.
After a storm comes a calm.
Be thine own palace, or the world's thy jail.
Always desire to learn something useful.
If you can dream it, you can do it.
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.