All of this is made possible through the covenantal righteousness of Jesus Christ. His was a living, active, and obedient faith that took him all the way to the cross. This faith was credited to him as righteousness.
—Norman Shepherd, The Call of Grace, 19.
Lest this interpretation of Shepherd’s view be regarded as a misreading of his position, it should be noted that Shepherd explicitly draws a parallel between what God obliges Abraham, Christ, and all believers to do as a necessary condition for their salvation. In his description of Christ’s saving work, Shepherd uses the same language that he earlier used to describe Abraham’s faith: “His [Christ’s] was a living, active, and obedient faith that took him all the way to the cross. This faith was credited to him as righteousness” (p. 19, emphasis mine). By this language Shepherd treats Christ as though he were little more than a model believer whose obedient faith constituted the ground for his acceptance with God in the same way that Abraham’s (and any believer’s) obedient faith constituted the basis for his acceptance with God. In his zeal to identify the covenant relationship between God and man in its pre- and post-fall administrations, Shepherd leaves little room to describe Christ’s work as Mediator of the covenant in a way that honors the uniqueness, perfection and sufficiency of Christ’s accomplishment for the salvation of his people.
—Cornelis Venema, Review of The Call of Grace, Mid-America Journal of Theology 13 (2002), 245.