Quote from the book "Sacred Bond: Covenant Theology Explored Second Edition"

"That Christ earned our redemption as the reward for his faithful work comforts us, for it assures us that we are saved by his merit and not our own. We are acceptable to the Father not because of our obedience, but because of his obedience. As Heidelberg Catechism Question 60 puts it, Although my conscience accuses me, that I have grievously sinned against all the commandments of God, and have never kept any of them, and am still prone always to all evil; yet God, without any merit of mine, of mere grace, grants and imputes to me the perfect satisfaction, righteousness, and holiness of Christ, as if I had never committed nor had any sins, and had myself accomplished all the obedience which Christ has fulfilled for me; if only I accept such benefit with a believing heart."