A “creature” can never be an end in itself, neither individual nor society nor the state, and neither can abstractions like the true, the good, and the beautiful be ends in themselves. For every creature as such exists by and, hence, for God. Science exists also for God’s sake and finds its final goal in his glory. Specifically, this then is true of theology; in a special sense it is from God and by God, and hence for God as well. But precisely because its final purpose does not lie in any creature, not in practice, or in piety, or in the church, amidst all the [other] sciences it maintains its own character and nature. Truth as such has value. Knowledge as such is a good. To know God in the face of Christ—by faith here on earth, by sight in the hereafter—not only results in blessedness but is as such blessedness and eternal life.
Reformed Dogmatics, vol. 1, ed. John Bolt and trans. John Vriend (Grand Rapids: Baker, 2003), p. 53