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Not sure if it's been mentioned, from; CHAPTER VII. What the justification of the impious is, and what are the causes thereof.
"the instrumental cause is the sacrament of baptism, which is the sacrament of faith, without which (faith) no man was ever justified"

I don't see how the other guy can say that BoD justifies, when the sacrament (which also requires water) is required for justification as this decree states. Please correct me if I am wrong or have misunderstood something.

The problem I have with that, is that Trent states that, "no man was ever justified" without "faith", and calls the sacrament of baptism the "sacrament of faith".

If the instrumental cause here (water baptism) can be substituted, then that substitution must also give "faith" or else it does not justify. Are there any decrees/infallible statements referring to BoD as giving faith?

Now they (adults) are disposed unto the said justice, when, excited and assisted by divine grace, conceiving faith by hearing, they are freely moved towards God, believing those things to be true which God has revealed and promised,-and this especially, that God justifies the impious by His grace, through the redemption that is in Christ Jesus; and when, understanding themselves to be sinners, they, by turning themselves, from the fear of divine justice whereby they are profitably agitated, to consider the mercy of God, are raised unto hope, confiding that God will be propitious to them for Christ's sake; and they begin to love Him as the fountain of all justice; and are therefore moved against sins by a certain hatred and detestation, to wit, by that penitence which must be performed before baptism: lastly, when they purpose to receive baptism, to begin a new life, and to keep the commandments of God. Concerning this disposition it is written; He that cometh to God, must believe that he is, and is a rewarder to them that seek him; and, Be of good faith, son, thy sins are forgiven thee; and, The fear of the Lord driveth out sin; and, Do penance, and be baptized every one of you in the name of Jesus Christ, for the remission of your sins, and you shall receive the gift of the Holy Ghost; and, Going, therefore, teach ye all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost; finally, Prepare your hearts unto the Lord.

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According to Trent, faith does not only ever come from baptism, but before baptism, when it comes "from hearing" as a divine aid to justification: (Session 6, chap. 5)
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CHAPTER VI.


The manner of Preparation.

Now they (adults) are disposed unto the said justice, when, excited and assisted by divine grace, conceiving faith by hearing, they are freely moved towards God, believing those things to be true which God has revealed and promised,-and this especially, that God justifies the impious by His grace, through the redemption that is in Christ Jesus; and when, understanding themselves to be sinners, they, by turning themselves, from the fear of divine justice whereby they are profitably agitated, to consider the mercy of God, are raised unto hope, confiding that God will be propitious to them for Christ's sake; and they begin to love Him as the fountain of all justice; and are therefore moved against sins by a certain hatred and detestation, to wit, by that penitence which must be performed before baptism: lastly, when they purpose to receive baptism, to begin a new life, and to keep the commandments of God. Concerning this disposition it is written; He that cometh to God, must believe that he is, and is a rewarder to them that seek him; and, Be of good faith, son, thy sins are forgiven thee; and, The fear of the Lord driveth out sin; and, Do penance, and be baptized every one of you in the name of Jesus Christ, for the remission of your sins, and you shall receive the gift of the Holy Ghost; and, Going, therefore, teach ye all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost; finally, Prepare your hearts unto the Lord.