Moderation is the key to peace. Do you not see how these two concepts fit like a hand in a glove? You cannot have peace when you are experiencing either too much or too little of anything, be it good or bad. This is why those who know peace intimately so often advise you to seek balance. Moderation lies close astride of the balance point. Just as on a see-saw, the closer you are to the center, the easier it is to come back into balance.
Are you always doing, doing, doing? Balance this with rest and relaxation. Are you often angry or happy to great extremes? Even though great happiness feels good to you, moderation is best, for the Law of Rhythm will come into play. The higher you allow your emotions to swing to one side, the greater they will swing back on the rebound. Yes, allow yourself joy, but in moderation. Seek the middle ground, and there you will find peace—a glove that fits the spirit quite perfectly.