John Trapp on 1 Thessalonians 1:4

Verſe 4. Knowing, brethren, beloved of God] Knowing it by the judgement of charity, not of infallibility. He that believeth hath the witneſſe in himſelf, 1 Job. 5.10. But the white ſtone, the new name, and the hid man of the heart are not certainly known to any, but to ſuch as have them. Howbeit, holy men in ſome degree are known one to another, to make the communion of Saints the ſweeter. Strong confidence one may have of anothers ſalvation: but no certainty either of ſenſe or of ſcience, much leſſe of faith, or immediate revelation.