The first principle of ethical power is Purpose. By purpose, I don't mean your objective or intention-something toward which you are always striving. Purpose is something bigger. It is the picture you have of yourself-the kind of person you want to be or the kind of life you want to lead.
Stephen CoveyInevitably, anytime we are too vulnerable we feel the need to protect ourselves from further wounds. So we resort to sarcasm, cutting humor, criticism - anything that will keep from exposing the tenderness within. Each partner tends to wait on the initiative of the other for love, only to be disappointed but also confirmed as to the rightness of the accusations made.
Stephen Covey