(8) God which knoweth the hearts.--We note the recurrence of the epithet as characteristic of St. Peter. (See Note on Acts 1:24.)

Verse 8. - Heart for hearts, A.V. (καρδιογνώστης). Bare them witness; i.e. set the mark of his approval upon them, vouched for their sincerity (see the use of the verb μαρτυρέω in Luke 4:22; John 3:26; Acts 6:3; Acts 10:22, etc.).

15:7-21 We see from the words purifying their hearts by faith, and the address of St. Peter, that justification by faith, and sanctification by the Holy Ghost, cannot be separated; and that both are the gift of God. We have great cause to bless God that we have heard the gospel. May we have that faith which the great Searcher of hearts approves, and attests by the seal of the Holy Spirit. Then our hearts and consciences will be purified from the guilt of sin, and we shall be freed from the burdens some try to lay upon the disciples of Christ. Paul and Barnabas showed by plain matters of fact, that God owned the preaching of the pure gospel to the Gentiles without the law of Moses; therefore to press that law upon them, was to undo what God had done. The opinion of James was, that the Gentile converts ought not to be troubled about Jewish rites, but that they should abstain from meats offered to idols, so that they might show their hatred of idolatry. Also, that they should be cautioned against fornication, which was not abhorred by the Gentiles as it should be, and even formed a part of some of their rites. They were counselled to abstain from things strangled, and from eating blood; this was forbidden by the law of Moses, and also here, from reverence to the blood of the sacrifices, which being then still offered, it would needlessly grieve the Jewish converts, and further prejudice the unconverted Jews. But as the reason has long ceased, we are left free in this, as in the like matters. Let converts be warned to avoid all appearances of the evils which they formerly practised, or are likely to be tempted to; and caution them to use Christian liberty with moderation and prudence.And God which knoweth the hearts,.... Of all men; he being omniscient, the searcher of the hearts, and the trier of the reins of the children of men, knew with what sincerity Cornelius sent for Peter; and with what vehement desire and longing expectation he and his family and friends waited for his coming; and with what earnestness, diligence, and affection they attended to what he said:

bore them witness, giving them the Holy Ghost, even as he did unto us; God bore a testimony, and showed his well pleasedness in the whole of this affair, by bestowing upon them not only the regenerating and sanctifying grace of the Spirit; but his extraordinary gifts, such as speaking with divers tongues, even in like manner as these were bestowed on the apostles themselves, on the day of Pentecost, though they were uncircumcised persons; for the drift of Peter's oration is to show, that circumcision was not necessary to salvation.