Romans 6:3

Know ye not, etc. - Every man who believes the Christian religion, and receives baptism as the proof that he believes it, and has taken up the profession of it, is bound thereby to a life of righteousness. To be baptized into Christ, is to receive the doctrine of Christ crucified, and to receive baptism as a proof of the genuineness of that faith, and the obligation to live according to its precepts.

Baptized into his death? - That, as Jesus Christ in his crucifixion died completely, so that no spark of the natural or animal life remained in his body, so those who profess his religion should be so completely separated and saved from sin, that they have no more connection with it, nor any more influence from it, than a dead man has with or from his departed spirit.

Know ye not - This is a further appeal to the Christian profession, and the principles involved in it, in answer to the objection. The simple argument in this verse and the two following is, that by our very profession made in baptism, we have renounced sin, and have pledged ourselves to live to God.

So many of us ... - All who were baptized; that is, all professed Christians. As this renunciation of sin had been thus made by all who professed religion, so the objection could not have reference to Christianity in any manner.

Were baptized - The act of baptism denotes dedication to the service of him in whose name we are baptized. One of its designs is to dedicate or consecrate us to the service of Christ: Thus 1 Corinthians 10:2, the Israelites are said to have been "baptized unto Moses in the cloud and in the sea;" that is, they became consecrated, or dedicated, or bound to him as their leader and lawgiver. In the place before us, the argument of the apostle is evidently drawn from the supposition that we have been solemnly consecrated by baptism to the service of Christ; and that to sin is therefore a violation of the very nature of our Christian profession.

Into - εἰς eis. This is the word which is used in Matthew 28:19, "Teach all nations, baptizing them into εἰς eis the name of the Father," etc. It means, being baptized unto his service; receiving him as the Saviour and guide, devoting all unto him and his cause.

Were baptized unto his death - We were baptized with special reference to his death. Our baptism had a strong resemblance to his death. By that he became insensible to the things of the world; by baptism we in like manner become dead to sin. Further, we are baptized with particular reference to the design of his death, the great leading feature and purpose of his work. That was, to expiate sin; to free people from its power; to make them pure. We have professed our devotion to the same cause; and have solemnly consecrated ourselves to the same design - to put a period to the dominion of iniquity.

6:3 As many as have been baptized into Jesus Christ have been baptized into his death - In baptism we, through faith, are ingrafted into Christ; and we draw new spiritual life from this new root, through his Spirit, who fashions us like unto him, and particularly with regard to his death and resurrection.