It's always too early to quit.
To know oneself, one should assert oneself.
Never complain and never explain.
Be gentle to all and stern with yourself.
Know or listen to those who know.
Be kind whenever possible. It is always possible.
Always desire to learn something useful.
If you're going through hell, keep going.
Wherever you are - be all there.
Be thine own palace, or the world's thy jail.
I've stopped apologizing to myself for having this great period of success and financial acceptance.