Long before John Deere or Case International Harvester, there was a tribulum. A tribulum was an ancient, wooden threshing board studded with sharp flint. On the threshing floor the tribulum was dragged around and around over the harvested grain. With repeated strikes and beatings the kernel and chaff would separate, leaving the precious grain ready to gather and store. Related to the word “tribulum” is the Latin verb tribulare, meaning “to oppress” or “afflict.” From these words we get our word “tribulation.” Jesus said, “In the world ye shall have tribulation…” (John 16:33). We think of oppression, affliction, beating, and...