2 Corinthians 12:12

Truly, &c.--There is understood some such clause as this, "And yet I have not been commended by you." in all patience, in signs, &c.--The oldest manuscripts omit "in." "Patience" is not one of the "signs," but the element IN which they were wrought: endurance of opposition which did not cause me to leave off working [ALFORD]. Translate, "IN . . . patience, BY signs," &c. His mode of expression is modest, putting himself, the worker, in the background, "were wrought," not "I wrought." As the signs have not been transmitted to us, neither has the apostleship. The apostles have no literal successors (compare Act 1:21-22). mighty deeds--palpable works of divine omnipotence. The silence of the apostles in fourteen Epistles, as to miracles, arises from the design of those Epistles being hortatory, not controversial. The passing allusions to miracles in seven Epistles prove that the writers were not enthusiasts to whom miracles seem the most important thing. Doctrines were with them the important matter, save when convincing adversaries. In the seven Epistles the mention of miracles is not obtrusive, but marked by a calm air of assurance, as of facts acknowledged on all hands, and therefore unnecessary to dwell on. This is a much stronger proof of their reality than if they were formally and obtrusively asserted. Signs and wonders is the regular formula of the Old Testament, which New Testament readers would necessarily understand of supernatural works.

— Jamieson-Fausset-Brown Commentary (public domain)