Jamieson, Fausset & Brown

Greek, "Faithful is the saying." For--"For" the fact is so that, "if we be dead with Him (the Greek aorist tense implies a state once for all entered into in past times at the moment of regeneration, Rom 6:3-4, Rom 6:8; Col 2:12), we shall also live with Him." The symmetrical form of "the saying," Ti2 2:11-13, and the rhythmical balance of the parallel clauses, makes it likely, they formed part of a Church hymn (see on Ti1 3:16), or accepted formula, perhaps first uttered by some of the Christian "prophets" in the public assembly (Co1 14:26). The phrase "faithful is the saying," which seems to have been the usual formula (compare Ti1 1:15; Ti1 3:1; Ti1 4:9; Tit 3:8) in such cases, favors this.