Obedience of Christ
...how the obedience of Christ should be made ours? Answer. By the free donation of God. For Christ is really given unto us in the word and sacraments; and consequently the obedience of Christ is made ours, even as when a piece of ground is made ours, the commodity thereof is ours also.
William Perkins, Works of William Perkins: Exposition of Galatians, eds. Shawn D. Wright and Andrew S. Ballitch, vol. 2 (Grand Rapids, MI: Reformation Heritage Books, 2019), 194