Galatians 1:3 - Matthew Poole's English Annotations on the Holy Bible

A common, as well as religious and Christian, form of salutation; Paul's mark in every Epistle, and used by him without any variation, (except in his Epistles to Timothy and Titus, where he only adds mercy &c.), the want of which, as also of his name, offers some grounds to doubt whether he wrote the Epistle to the Hebrews. Paul had used it in the beginning of his Epistle to the Romans, and both the Epistles to the Corinthians: see the notes on Romans 1:7 1 Corinthians 1:3 2 Corinthians 1:2. It teaches us, in our common discourses, whether epistolary or otherwise, to speak to our friends like Christians, who understand and believe that the grace, mercy, and peace from God, are the most desirable good things.