Life is a process of dynamic equilibrium, and everything that contributes to it is good only in moderation. A healthy diet of food, money, or emotion is one that stays within certain limits.
Only when we perceive the excesses within ourselves, and work to reduce them, does the human soul become visible. We discover more in the effort to return to equilibrium than by staying at equilibrium itself. Thus we know ourselves by our excesses (or our unmet needs) in regard to the cup, the pocket, and rage.
— Nilton Bonder, The Kabbalah of Envy