Joseph Benson's Commentary of the Old and New Testaments - Galatians 2:14
Galatians 2:14 . When I saw that, in this matter, they walked not uprightly Ουκ ορθοποδουσι , did not walk with a straight step, or in a plain and straight path; according to the truth of the gospel That is, according to their own knowledge of the simplicity of the true gospel doctrine; I said to Peter, before them all That is, in the hearing of Barnabas and all the Judaizers: see Paul single against Peter and all the Jews! If thou, being a Jew And having been brought by... read more
Albert Barnes' Notes on the Whole Bible - Galatians 2:14
But when I saw that they walked not uprightly - To walk, in the Scriptures, is usually expressive of conduct or deportment; and the idea here is, that their conduct in this case was not honest.According to the truth of the gospel - According to the true spirit and design of the gospel. That requires perfect honesty and integrity; and as that was the rule by which Paul regulated his life, and by which he felt that all ought to regulate their conduct, he felt himself called on openly to reprove... read more