It's always too early to quit.
Be thine own palace, or the world's thy jail.
Always desire to learn something useful.
I can, therefore I am.
If you're going through hell, keep going.
Well done is better than well said.
Know or listen to those who know.
Problems are not stop signs, they are guidelines.
The secret of getting ahead is getting started.
If you can dream it, you can do it.
It is the nature of truth in general, as of some ores in particular, to be richest when most superficial.