It’s amazing what you can haul with a bicycle. An average adult with a specialized trailer (and a bit of determination) can use a bicycle to tow up to 300 pounds at 10 mph. There’s just one problem: Hauling a heavier load means moving more slowly. A person hauling 600 pounds of work equipment or personal possessions would only be able to move at a pace of 8 miles in one hour.

Moses carried another kind of weight in the wilderness—an emotional weight that kept him at a standstill. The Israelites’ intense craving for meat instead of manna had reduced them…