If you must pry, the gospel according to alcoholics anonymous.
I was making an apparently weak attempt at humor. "To thine own self be true" is a line recited by the character Polonius in Shakespeare's Hamlet.
Yesterday in mass, the priest talked a while about prayer, about coming to God in truth, being truthful about who you are (particularly since God knows).
We spend a lot of mental time being untruthful to ourself about who we really are, I think.
To thine own self be true. It's harder than it sounds.