“A tranquil heart gives life to the flesh, but envy makes the bones rot.” (Proverbs 14:30, ESV) Having a tranquil heart is a good way to live. It sounds peaceful, calm, serene. But often life is not as tranquil as we would like because other things creep in—things that tear down rather than build up. Throughout the Bible, along with many uplifting passages we find stories of conflict, dissatisfaction, resentment, envy, and jealousy. Cain killed Able because of jealousy and resentment that Able offered the better sacrifice. Joseph’s brothers grew jealous because their father favored him most. King Saul became…