The Augsburg Confession
Forasmuch, therefore, as the doctrine concerning faith, which ought to be the chief one in the Church, has lain so long unknown, as all must needs grant that there was the deepest silence in their sermons concerning the righteousness of faith, while only the doctrine of works was treated in the churches, our teachers have instructed the churches concerning faith as follows: --
First, that our works cannot reconcile God or merit forgiveness of sins, grace, and justification, but that we obtain this only by faith when we believe that we are received into favor for Christs sake, who alone has been set forth the Mediator and Propitiation, 1 Tim. 2, 6, in order that the Father may be reconciled through Him. Whoever, therefore, trusts that by works he merits grace, despises the merit and grace of Christ, and seeks a way to God without Christ, by human strength, although Christ has said of Himself: I am the Way, the Truth, and the Life. John 14, 6.
This doctrine concerning faith is everywhere treated by Paul, Eph. 2, 8: By grace are ye saved through faith; and that not of yourselves; it is the gift of God, not of works, etc.
And lest any one should craftily say that a new interpretation of Paul has been devised by us, this entire matter is supported by the testimonies of the Fathers. For Augustine, in many volumes, defends grace and the righteousness of faith, over against the merits of works. And Ambrose, in his De Vocatione Gentium, and elsewhere, teaches to like effect. For in his De Vocatione Gentium he says as follows: Redemption by the blood of Christ would become of little value, neither would the preeminence of man's works be superseded by the mercy of God, if justification, which is wrought through grace, were due to the merits going before, so as to be, not the free gift of a donor, but the reward due to the laborer....
Furthermore, it is taught on our part that it is necessary to do good works, not that we should trust to merit grace by them, but because it is the will of God. It is only by faith that forgiveness of sins is apprehended, and that, for nothing. And because through faith the Holy Ghost is received, hearts are renewed and endowed with new affections, so as to be able to bring forth good works. For Ambrose says: Faith is the mother of a good will and right doing. For man's powers without the Holy Ghost are full of ungodly affections, and are too weak to do works which are good in God's sight. Besides, they are in the power of the devil who impels men to divers sins, to ungodly opinions, to open crimes. This we may see in the philosophers, who, although they endeavored to live an honest life could not succeed, but were defiled with many open crimes. Such is the feebleness of man when he is without faith and without the Holy Ghost, and governs himself only by human strength.
The Thirty-nine Articles of Religion of the Church of England, Article XII
Of Good Works
Albeit that Good Works, which are the fruits of Faith, and follow after Justification, cannot put away our sins, and endure the severity of God's judgment; yet are they pleasing and acceptable to God in Christ, and do spring out necessarily of a true and lively Faith; insomuch that by them a lively Faith may be as evidently known as a tree discerned by the fruit.
The Savoy Declaration of Faith and Order, Chapter XVI Of Good Works
II. These good works done in obedience to God's commandments, are the fruits and evidences of a true and lively faith; and by them believers manifest their thankfulness, strengthen their assurance, edify their brethren, adorn the profession of the gospel, stop the mouths of the adversaries, and glorify God, whose workmanship they are, created in Christ Jesus thereunto; that having their fruit unto holiness, they may have the end, eternal life.
III. Their ability to do good works is not at all of themselves, but wholly from the Spirit of Christ. And that they may be enabled thereunto, besides the graces they have already received, there is required an actual influence of the same Holy Spirit to work in them to will and to do of his good pleasure; yet are they not hereupon to grow negligent, as if they were not bound to perform any duty unless upon a pecial motion of the Spirit; but they-ought to be diligent in stirring up the grace of God that is in them.
The Waldensian Confession, Articles XX-XXXIII
XX. That as God promised us regeneration in Jesus Christ, so those who are united to him by a living faith ought to apply, and do really apply themselves, unto good works.
XXI. That good works are so necessary to the faithful that they can not attain the kingdom of heaven without the same, seeing that God has prepared them that we should walk therein; and there fore we ought to flee from vice, and apply ourselves to Christian virtues, making use of fasting, and all other means which may conduce to so holy a thing.
XXII. That, although our good works can not merit any thing, yet the Lord will reward or recompense them with eternal life, through the merciful continuation of his grace, and by virtue of the unchangeable constancy of his promises made unto us.
John Calvin's Commentary on the Epistle of James
"When Paul says that we are justified by faith, he means no other thing than that by faith we are counted righteous before God. But James has quite another thing in view, even to shew that he who professes that he has faith, must prove the reality of his faith by his works...Man is not justified by faith alone, that is, by a bare and empty knowledge of God; he is justified by works, that is, his righteousness is known and proved by its fruits."