…Just as Adam was obliged to meet the conditions of the covenant that God graciously established with him, so believers are obliged to meet the conditions of the covenant of grace in order to inherit eternal life. Just as Christ was obliged to live in covenantal loyalty and faithfulness to God, Shepherd maintains, “so his followers must be faithful in order to inherit the blessing” (p. 19). As we have noted, Shepherd is even willing to speak of Christ’s obedient faith being “credited to him as righteousness” in a manner parallel to the way Abraham’s (and every believer’s) obedient faith is credited to him for righteousness.
But this kind of parallel between Christ’s faith and ours would mean that the believer’s inheritance in the covenant of grace finally depends upon his following Christ’s example. Salvation and blessing are the (non-meritorious, though earned?) reward of the covenant for those who keep the covenant’s conditions and stipulations. Missing from Shepherd’s discussion at this juncture are several key features of the historic Reformed view of salvation. Shepherd does not make
it clear, for example, that the believer can only obtain eternal life upon the basis of the perfect obedience, satisfaction and righteousness of Christ alone received by faith alone (compare the Heidelberg Catechism, Lord’s Days 23 & 24). Nor does he make it clear (indeed, on page 62 he seems to deny it) that the believer’s imperfect obedience, which Christ by his Spirit graciously works in him, adds nothing to the work of Christ in respect to his standing before God and right to eternal life. Rather, Shepherd argues that the traditional Reformed view, which insists that the (sinfully imperfect) good works of believers provide no basis for their acceptance before God, fails to do justice to the genuine obedience of believers (p. 62). By this argument he fails to appreciate the classic Reformed conviction that Christ’s work as Mediator of the covenant of grace constitutes the only ground for the believer’s justification (and sanctification!) before God.
—Cornelis Venema, Review of The Call of Grace