“The special end of the covenant of grace is, ‘the praise of the glory of His grace,’ (Eph. 1:6), and the revelation of His unsearchable and manifold wisdom: which divine perfections shine forth with lustre in the gift of a Mediator, by whom the sinner is admitted to complete salvation, without any dishonour to the holiness, justice, and truth of God.
There is also a demonstration of the all-sufficiency of God, by which not only man, but even a sinner, which is more surprising, may be restored to union and communion with God.”
–Herman Witsius, The Economy of the Covenants Between God and Man, Volume 1 (Grand Rapids, MI: Reformation Heritage, 1681/2021), 1: 27.