I.Obedience to moral law is a condition of physical health. Heart-obedience is required. The connection is clear from three facts.
1. That physical health requires obedience to the Divine laws of our being.
2. That obedience to the Divine laws of our being involves the study of them.
3. That a hearty agreement with the Divine will is essential to secure the study of His laws.
II. Obedience to moral law is a condition of spiritual peace. Peace of soul requires two things.
1. The inward harmony of its powers.
2. The sense of theDivine favour. The feeling, or even the fear, that the Lord is against it, gives it the throb of perpetual restlessness or torture. Obedience to moral law secures the two conditions of this peace. (D. Thomas, D. D.)