And all thy house - Thy family. This is a circumstance which his omitted in the account in Acts 10: It is said, however, in Acts 10:2, that Cornelius feared God with all his house. It is evident from Acts 10:48 that the family also received the ordinance of baptism, and was received into the church.

Thou and all thy house shall be saved - This is an additional circumstance: before, it was said, Acts 10:6, Peter shall tell thee what thou oughtest to do; and, in Acts 10:33, who, when he cometh, shall speak unto thee. But, in Peter's relation, the matter is more explicitly declared, he shall tell thee words whereby thou and thy house shall be saved. He shall announce to you all the doctrine of salvation.

Who shall tell thee words,.... Preach doctrines, such as relate to the person and office of Christ, to peace and pardon, and righteousness and salvation by him; such as Peter did preach, as appears by his discourse in the preceding chapter:
whereby thou and all thy house shall be saved; that is, which would be a means of instructing him and his family in the right and true way of salvation; for the Gospel only points out the way of salvation, and is only effectual to it, when it is accompanied with, the power of God: multitudes hear it, and yet are not saved by and those to whom it comes not in word only, but in power, are saved only by Christ, who is revealed in it, as God's way of salvation; it is not bare hearing the word and attending on ordinances that will save any, only such who believe in Christ with the heart, who is the sum and substance of the Gospel, are saved; and still less are any saved by the faith of others; the house or family of Cornelius were not saved by his believing in Christ; but the words of faith and sound doctrine being preached to them, as to him, and faith coming thereby to one as to another, they were saved in one and the same way, namely, through faith in Christ Jesus.

Who shall tell thee words whereby thou and all thy house shall be saved--The historian makes the angel express this much more generally (Acts 10:6). So also the subsequent report of it by the deputies and by Cornelius himself to Peter (Acts 10:22, Acts 10:32). But as Peter tarried with Cornelius certain days, and they doubtless talked over the wonderful scene together, perhaps this fuller and richer form of what the angel said was given to Peter; or the apostle himself may have expressed what the angel certainly designed by directing them to send for him. Observe, "salvation" is here made to hang upon "words," that is, the Gospel message concerning Christ. But on the "salvation" of Cornelius, see on Acts 10:34-35. On that of his "house," see on Luke 19:10.

Saved - With the full Christian salvation, in this world and the world to come.