SEV Biblia, Chapter 1:20
Y en esto que os escribo, he aquí delante de Dios, que no miento.
Clarke's Bible Commentary - Galatians 1:20
Verse 20. Before God I lie not.] This he speaks in reference to having seen only Peter and James at Jerusalem; and consequently to prove that he had not learned the Gospel from the assembly of the apostles at Jerusalem, nor consequently received his commission from them.
John Gill's Bible Commentary
Ver. 20. Now the things which I write unto you , etc..] Concerning his education, his religion, his principles and practices before conversion; concerning his call by the grace of God, the revelation of Christ in him, and his preaching of him among the Heathen; concerning his travels to several places for this purpose, and especially concerning his not receiving the Gospel from men, not from any of the apostles; and how that upon his conversion he did not go up to Jerusalem to any of them, to be taught and sent forth by them; and that it was not till three years after that he wept thither to see Peter, with whom he stayed but fifteen days, and saw no other apostle, but James the Lord's brother. Now this being a matter of moment, and what he had been charged with by the false teachers, that the Gospel he preached he had received from men, in order to disqualify him and bring him into contempt as an apostle, and which they had insinuated to the Galatians; he therefore not only wrote these things, but for the confirmation of them solemnly appeals to God the searcher of hearts for the truth of them; behold, before God I lie not ; which is not only a strong asseveration, but a formal oath; it is swearing by the God of truth, calling him to be witness of the things that he had written; whence it is manifest that an oath upon proper occasions, where there is a necessity for it, and a good end to be answered by it, may be lawfully made.
Matthew Henry Commentary
Verses 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 wil but little avail us to have Christ revealed to us, if he is not als 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 the have ever seen them or not! They glorify God for his power and mercy i saving such persons, and for all the service to his people and caus that is done, and may be further expected from them __________________________________________________________________
Greek Textus Receptus
α 3739 δε 1161 γραφω 1125 5719 υμιν 5213 ιδου 2400 5628 ενωπιον 1799 του 3588 θεου 2316 οτι 3754 ου 3756 ψευδομαι 5574 5736
Vincent's NT Word Studies
20. I lie not. Comp. Rom. ix. 1; 2 Cor. xi. 31; 1 Tim. ii. 7.
Robertson's NT Word Studies
1:20 {I lie not} (ou yeudomai). So important does he deem the point that he takes solemn oath about it.