So also the tongue is a small part of the body, and yet it boasts of great things. A small piece of metal enables us to control a very powerful beast. A great merchant ship driven by strong winds can be controlled by the helmsman with a simple movement of the rudder. An enormous forest fire can be ignited by a carelessly dropped match. The point of all these illustrations seems obvious.
Little things mean a lot.
Something small can be devastating in its effects. A friend of mine was riding on his motorcycle on an expressway in Dallas, Texas, when a bug flew into his mouth. He was so startled that he lost control of his bike and ran into the concrete support of an overpass. He spent the next six months in traction. Fortunately he recovered completely.