If the strings of a musical instrument are strung too tightly, they will break. Strung too loosely, the instrument will not play. Only when the strings are properly balanced will the instrument play well. Moderation is likewise vital to how well we function. If we give in to excess: such as indulging or depriving ourselves physically, or if we focus too much on one aspect of our lives while neglecting another, our lives, like that instrument, will not play out well. With moderation balance will be more attainable.