"But when we are speaking of the subject itself, it is certain that the doctrine of gracious reconciliation, of the remission of sins, of righteousness, salvation, and eternal life through faith for the sake of the Mediator is one and the same in the Old and in the New Testament. This is a useful rule which we must retain at all costs: The doctrine, wherever we read it, in either the Old or New Testament, which deals with the gracious reconciliation and the remission of sins through faith for the sake of God's mercy in Christ, is the Gospel."
Martin Chemnitz, Loci Theologici, St. Louis: Concordia Publishing House, 1989, II, p. 459.
"Therefore God, 'who is rich in mercy' [Ephesians 2:4], has had mercy upon us and has set forth a propitiation through faith in the blood of Christ, and those who flee as suppliants to this throne of grace He absolves from the comprehensive sentence of condemnation, and by the imputation of the righteousness of His Son, which they grasp in faith, He pronounces them righteous, receives them into grace, and adjudges them to be heirs of eternal life. This is certainly the judicial meaning of the word 'justification,' in almost the same way that a guilty man who has been sentenced before the bar of justice is acquitted."
Chemnitz, Loci Theologici, 1989, II, p. 482.
"Yet these exercises of faith always presuppose, as their foundation, that God is reconciled by faith, and to this they are always led back, so that faith may be certain and the promise sure in regard to these other objects. This explanation is confirmed by the brilliant statement of Paul in 2 Corinthians 1:20: 'All the promises of God in Christ are yea and amen, to the glory of God through us,' that is, the promises concerning other objects of faith have only then been ratified for us when by faith in Christ we are reconciled with God. The promises have been made valid on the condition that they must give glory to God through us."
Chemnitz, Loci Theologici, 1989, II, p. 495.
"Therefore this apprehension or acceptance or application of the promise of grace is the formal cause or principle of justifying faith, according to the language of Scripture."
Chemnitz, Loci Theologici, 2 vols., II, p. 502.
"We must note the foundations. For we are justified by faith, not because it is so firm, robust, and perfect a virtue, but because of the object on which it lays hold, namely Christ, who is the Mediator in the promise of grace. Therefore when faith does not err in its object, but lays hold on that true object, although with a weak faith, or at least tries and wants to lay hold on Christ, then there is true faith, and it justifies. The reason for this is demonstrated in those lovely statements in Philippians 3:12: 'I apprehend, or rather I am apprehended by Christ' and Galatians 4:9: 'You have known God, or rather have been known by God.' Scripture shows a beautiful example of this in Mark 9:24: 'I believe; help my unbelief.'"
Martin Chemnitz, Loci Theologici, 2 vols., II, p. 503. Philippians 3:12; Galatians 4:9; Mark 9:24.
"For we are not justified because of our faith (propter fidem), in the sense of faith being a virtue or good work on our part. Thus we pray, as did the man in Mark 9:24: 'I believe, Lord; help my unbelief'; and with the apostles: 'Lord, increase our faith,' Luke 17:5."
Martin Chemnitz, Loci Theologici, 2 vols., II, p. 506. Mark 9:24; Luke 17:5.
"But because not doubt but faith justifies, and not he who doubts but he who believes has eternal life, therefore faith teaches the free promise, which relies on the mercy of God for the sake of the sacrifice of the Son, the Mediator, and not on our works, as Paul says in Romans 4:16: 'Therefore it is of faith, that the promise might be sure according to grace.'"
Martin Chemnitz, Loci Theologici, 2 vols., II, p. 507. Romans 4:16
"Thus when we say that we are justified by faith, we are saying nothing else than that for the sake of the Son of God we receive remission of sins and are accounted as righteous. And because it is necessary that this benefit be taken hold of, this is said to be done 'by faith,' that is, by trust in the mercy promised us for the sake of Christ. Thus we must also understand the correlative expression, 'We are righteous by faith,' that is, through the mercy of God for the sake of His Son we are righteous or accepted."
Melanchthon, Loci Communes, “The Word Faith.” Cited in Martin Chemnitz, Loci Theologici, II, p. p. 489.