He was a murderer — In inclination, from the beginning — Of his becoming a devil; and abode not in the truth — Commencing murderer and liar at the same time. And certainly he was a killer of men (as the Greek word properly signifies) from the beginning of the world: for from the very creation he designed and contrived the ruin of men. When he speaketh a lie, he speaketh of his own — For he is the proper parent, and, as it were, creator of it. See the origin not only of lies, but of evil in general!
Related Commentaries of John 8:44
John 8:44
44 Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own:a for he is a liar, and the father of it.