Cardinal:
Peter was prevailed upon to carry the blessing to the foreigner, Cornelius (son of Japheth). The Ethiopian eunuch had joined himself to Jehovah's covenant in full obedience, even submitting to circumcision, which constituted him a proselyte of righteousness, with the social and religious privilege of going to Jerusalem and worshiping IN "the Father's House"--The temple. Yet an important fact to be noted here ,is , that the eunuch had gone to Jerusalem to worship, and had left without hearing of Jesus Christ! This reveals to what lengths the apostasy had developed in two short years! With his baptism into the name of JC, he went on his way rejoicing ( Act. 8:26-39), according as the prophets had foretold, "rejoicing with His people" Deut. 32:43
Some six years later--about eight years after Pentecost--- we find Peter, in obedience to his heavenly visions and charge ( Act 10:9-16), at the house of Cornelius, speaking words by which he and his house were to be saved (act. 11: 14). Cornelius was a "foreigner who joined himself to Jehovah, keeping His Sabbaths and holding fast His covenant" (Isa. 56:1-8). He was "devout and fearing God with his entire house, doing alms to the people {Israel} and beseeching God continually, ...Besides being attested by the whole nation of the Jews" ( Act 10: 2, 22. But he had not been circumcised. Therefore, by not submitting to the covenant of circumcision, he was recognized as only a proselyte of the gate, and as such, was considered a "foreigner" ( Act. 10:28; 11:2-3; Gal. 2:11-13), outside the social and religious fellowship of the nations of the Jews. After the heavenly visions and charge from God, Peter went and used the "keys" of the kingdom committed to him by the Lord, Bringing to Cornelius and his house "the gospel of the Circumcision" ( Act 10:34-35; 11:14). Consequently, the Holy Spirit was poured out on them and they spake in languages and magnified God, according as the prophets had foretold ( Act 10: 46; Psa. 117:1-2). Then peter bids them to be baptized in the name of JC ( Act. 10:47-48).