Vincent's NT Word Studies
9. Ye have respect to persons (proswpolhmpteite). Only here in New Testament. See on ver. 1.Ye commit sin (amartian ergazesqe). Lit., "work sin." Compare Matt. vii. 23; Acts x. 35; Heb. xi. 33. The phrase is rather stronger than the more common aJmartian poiein, to do sin, John viii. 34; James v. 15; 1 Pet. ii. 29. The position of sin is emphatic: "it is sin that ye are working."
And are convinced (elegcomenoi). Rather, as Rev., convicted. The word, which is variously rendered in A.V. tell a fault, reprove, rebuke, convince, while it carries the idea of rebuke, implies also a rebuke which produces a conviction of the error or sin. See on John viii. 46. Compare John iii. 20; viii. 9; 1 Corinthians xiv. 24, 25.