But about 36 C.E. God directed Peter to go to the home of the Gentile Cornelius, a Roman army officer, and by pouring out His holy spirit on Cornelius and his household, showed Peter that Gentiles could now be accepted for water baptism. (Ac 10:34, 35, 44-48)

The people of the Gentile nations, except for those who had been circumcised Jewish proselytes, were not in the Law covenant and had never been a people having a special relationship with God the Father. Now the opportunity was extended to them as individuals to become God’s people. Before they could be baptized in water they, therefore, had to come to God as believers in his Son Jesus Christ. Then, according to Christ’s example and command, they would properly submit to water baptism.​—Mt 3:13-15; 28:18-20.