1:15-24 St. Paul was wonderfully brought to the knowledge and faith of Christ. All who are savingly converted, are called by the grace of God; their conversion is wrought by his power and grace working in them. It will but little avail us to have Christ revealed to us, if he is not also revealed in us. He instantly prepared to obey, without hesitating as to his worldly interest, credit, ease, or life itself. And what matter of thanksgiving and joy is it to the churches of Christ, when they hear of such instances to the praise of the glory of his grace, whether they have ever seen them or not! They glorify God for his power and mercy in saving such persons, and for all the service to his people and cause that is done, and may be further expected from them.
16. reveal his Son in me—within me, in my inmost soul, by the Holy Spirit (Ga 2:20). Compare 2Co 4:6, "shined in our hearts." The revealing of His Son by me to the Gentiles (so translate for "heathen") was impossible, unless He had first revealed His Son in me; at first on my conversion, but especially at the subsequent revelation from Jesus Christ (Ga 1:12), whereby I learned the Gospel's independence of the Mosaic law.
that I might preach—the present in the Greek, which includes the idea "that I may preach Him," implying an office still continuing. This was the main commission entrusted to him (Ga 2:7, 9).
immediately—connected chiefly with "I went into Arabia" (Ga 1:17). It denotes the sudden fitness of the apostle. So Ac 9:20, "Straightway he preached Christ in the synagogue."
I conferred not—Greek, "I had not further (namely, in addition to revelation) recourse to … for the purpose of consulting." The divine revelation was sufficient for me [Bengel].
flesh and blood—(Mt 16:17).