“But, if we consider, as physicists now claim, that everything is energy—everything we see, everything we think, everything we do—then it is just possible that this same law of conservation of energy applies to questions of morality. A conservation of moral energy, a maintenance of equilibrium… a balance exists and must be preserved. If an action is taken that disrupts that balance, then an action similar in kind and degree is required to restore equilibrium.”
Book:Eye for Eye