Deuteronomy 30:19

19.I call heaven and earth to record this day against you. Though the verb is in the past tense, it indicates a present act. It is in order to deal with them with greater urgency that he calls heaven and earth to witness the vengeance of God. In these words he does not address men and angels, as some tamely expound it, but in amplification attributes sense to things inanimate. I pass this over briefly, because I have (288) treated it more fully before; as also what soon afterwards follows about life and death. For the Law, as respects its doctrine, contains in it life and death; for the reward of eternal life is not promised in it in vain; but since no one is found worthy of the promised reward, Paul justly teaches that the Law ministers death. Still this is accidental, and proceeds not from any fault in the doctrine, but from the corruption of men. Nevertheless, it is asked how, if the corruption of our nature causes that the Law should engender nothing but death, Moses commands us to “choose life,” which the sinner cannot attain to by it? Thence the Papists uplift their crests, both to extol free-will and to boast of merits; as if Moses did not also testify and proclaim the gratuitous mercy of God, and direct his disciples to Christ in order to seek salvation from Him. When, therefore, he speaks of keeping the Commandments, he does not exclude the two-fold grace of Christ, that believers, being regenerated by the Spirit, (289) should aspire to the obedience of righteousness, and at the same time should be reconciled freely to God through the forgiveness of their sins. And assuredly, since the same covenant is common to us and to the ancient people, it is not to be doubted but that they “chose life” who of old embraced the doctrine of Moses. At the same time, in so far as his legation was different from the Gospel, he rather insists on the office peculiarly entrusted to him, so that the distinction between Christ and himself might more clearly appear. This is the reason why he more sparingly touches upon justification by faith, whilst he enlarges fully on loving and serving God and fulfilling His Commandments.