1:1-9 All Christians are by baptism dedicated and devoted to Christ, and are under strict obligations to be holy. But in the true church of God are all who are sanctified in Christ Jesus, called to be saints, and who call upon him as God manifest in the flesh, for all the blessings of salvation; who acknowledge and obey him as their Lord, and as Lord of all; it includes no other persons. Christians are distinguished from the profane and atheists, that they dare not live without prayer; and they are distinguished from Jews and pagans, that they call on the name of Christ. Observe how often in these verses the apostle repeats the words, Our Lord Jesus Christ. He feared not to make too frequent or too honourable mention of him. To all who called upon Christ, the apostle gave his usual salutation, desiring, in their behalf, the pardoning mercy, sanctifying grace, and comforting peace of God, through Jesus Christ. Sinners can have no peace with God, nor any from him, but through Christ. He gives thanks for their conversion to the faith of Christ; that grace was given them by Jesus Christ. They had been enriched by him with all spiritual gifts. He speaks of utterance and knowledge. And where God has given these two gifts, he has given great power for usefulness. These were gifts of the Holy Ghost, by which God bore witness to the apostles. Those that wait for the coming of our Lord Jesus Christ, will be kept by him to the end; and those that are so, will be blameless in the day of Christ, made so by rich and free grace. How glorious are the hopes of such a privilege; to be kept by the power of Christ, from the power of our corruptions and Satan's temptations!
6. According as the testimony of (of, and concerning) Christ (who is both the object and author of this testimony [Bengel]; 1Co 2:1; 1Ti 2:6; 2Ti 1:8) was confirmed among [Alford] you; that is, by God, through my preaching and through the miracles accompanying it (1Co 12:3; Mr 16:20; 2Co 1:21, 22; Ga 3:2, 5; Eph 4:7, 8; Heb 2:4). God confirmed (compare Php 1:7; Heb 2:3), or gave effect to the Gospel among (or better as English Version, "in") the Corinthians by their accepting it and setting their seal to its truth, through the inward power of His Spirit, and the outward gifts and miracles accompanying it [Calvin].