Clarence Macartney tells of a certain Canadian river which flows through a forbidding chasm. Looming on either side of the river are rugged, uninviting crags which bear the names "Eternity" and "Trinity." Macartney suggests that the opposing crags invite an analogy (you understand of course, that to a preacher, most everything invites analogy). "Inseparable from any true conception of God," he says, "are always the two doctrines of God's eternity and God's trinity ... The threefold experience of God the Father, God the Son, and God the Holy Spirit." The great preacher then goes on to conclude that both doctrines lie helplessly beyond human comprehension.