“Several years ago the respected evangelical leader Francis Schaeffer used the example of a watershed in the Swiss Alps to illustrate what happens when some Christians begin to abandon the complete truthfulness of the Bible in places where it speaks to matters of history and science. When spring comes, two bits of snow that are only an inch apart in the high mountains of Switzerland will melt on two sides of a ridge in the rock, and the drop of water from one side of the watershed will eventually flow into the Rhine River and then into the cold waters of the North Sea, while the drop of water on the other side of the watershed will eventually flow into the Rhone River and finally into the Mediterranean Sea. In the same way, Christians who seem so close together on many issues, if they differ on the watershed issue of biblical inerrancy, will in the next generation or two train up disciples who will be a thousand miles apart from each other on many of the most central matters taught in the Bible.”
~ Wayne Grudem, “Theistic Evolution Undermines Twelve Creation Events and Several Crucial Christian Doctrines,” in Theistic Evolution: A Scientific, Philosophical, and Theological Critique (ed. by Moreland, Meyer, Shaw, Gauger, Grudem), p.822.