Dr. Corneilus Plantinga has a few words to say about gratitude, and it may just change your life--physically, spiritually, and emotionally. A habit of gratitude can lower your blood pressure and help you sleep better. But the habit of gratitude also ties us together collectively, in community and in church. When there is genuine appreciation of an act of kindness or a loving word, the memory of that “thank you” is a cushion when disagreement tries to divide us. Gratitude for God’s gifts remin...