Everyone who sins also commits lawlessness. Sin is lawlessness.
(77) To do, or to commit, or to work, or to practice, sin, and to sin, are evidently used in the same sense by the Apostle: and to commit or practice sin, according to what he says in his Gospel, (John 8:34,) is the same with being “the servant of sin.” It is hence evident, that in the language of John, to do sin, or to sin, means a prevailing or an habitual course of sinning. 