Think of a trail race. The trail is carefully marked for the runners -- a flag here, a ribbon there, an arrow over there, marking the course in advance so that all the runners get through it without getting lost.
What a profound encouragement to know that the God who gets us started on the race of life has already marked out the direction which our lives are to take. He has prepared the way spiritually and morally, vocationally and relationally, for our good and his glory. What a marvelous reassurance for Christian runners.
The race is marked out!