--Kevin L. Moore
1 Not “perfection” (NIV). The substantival use of the adjective téleios here does not have an explicit referent: the “perfect” what? This word appears eight times in the Pauline writings: Rom. 12:2; 1 Cor. 2:6; 13:10; 14:20; Eph. 4:13; Phil. 3:15; Col. 1:28; 4:12.
2 This assessment is not conclusive, however, since the neuter form may simply convey a general principle (see D. B. Wallace, Greek Grammar Beyond the Basics 295, 333); cp. 1 John 1:1.
3 This coincides with the death of the apostles through whom miraculous gifts were imparted (Acts 8:18). Alternatively, it has been suggested that to téleion (cp. Eph. 4:13) may refer to the maturation of the church, which could point to the same historical juncture as the completion of the NT. Others interpret to téleion in view of the believer’s eternal state, whether at death or the Lord’s parousia (see F. D. Farnell, “When Will the Gift of Prophecy Cease?” BibSac 150 : 191-93).
Image credit: Adapted from https://www.beliefnet.com/inspiration/galleries/the-most-miraculous-moments-caught-on-camera-in-2016.aspx