John 8:44

Ye are of your father the devil
Not of his substance, but by imitation and example; and as being under his authority and influence, his instructions and directions, and ready to follow after him, and obey his commands; the word "your" is rightly supplied, and is in some copies:

and the lusts of your father ye will do;
the Syriac and Persic versions read in the singular number, "the lust", or "desire of your father"; by which may be particularly meant, his eager desire after the death of Christ, which he showed at different times; he instigated Herod to seek to destroy his life in his infancy, and when he was just entering on his public ministry, he tempted him to destroy himself; and often stirred up the Scribes and Pharisees, to stone him or kill him, some other way; and at last put it into the heart of one of his disciples, Judas Iscariot, to betray him: this looks as if though the devil had a notion of the salvation of men by Christ, yet that he thought, as some erroneous men have also done, that it was only by his doctrine and example, and therefore he was in haste to get him out of the world, that he might not be useful, or any more so that way; and not by the shedding of his blood, the sacrifice of himself, or by his sufferings and death, in the room of sinners; or otherwise it is scarcely credible, that he would have sought his death so earnestly: now this selfsame lust and insatiable desire after the death of Christ prevailed in the Jews; and they were resolute and bent upon fulfilling it at any rate, nor could anything divert them from it; this is the thing Christ is speaking of in the context, and is what fully proved the devil to be their father, and them to be his children:

he was a murderer from the beginning;
he was not only spoken of from the beginning, as he that should bruise the Messiah's heel, or should compass his death, but he was actually a murderer of Adam and Eve, and of all their posterity, by tempting them to sin, which brought death and ruin upon them; and who quickly after that instigated Cain to slay his brother; and has had, more or less, a concern in all murders committed since; and has been in all ages, and still is, a murderer of the souls of men; and therefore is rightly called Abaddon, and Apollyon, which signify the destroyer: the phrase, "from the beginning", does not intend the beginning of his own creation; for he was created a holy creature, was in the truth, though he abode not in it; and was in an happy state, though he lost it: nor strictly the beginning of time, or of the creation of the world, which were some days at least before the fall of man, when the devil commenced a murderer; but it being very near it, therefore this phrase is made use of: the Syriac version renders it, "from Bereshith", which is the first word in the Hebrew Bible, and is frequently used by the Jewish Rabbins for the six days of the creation; and if Adam fell, as some think, the same day he was created, it might be properly said that the devil was a murderer from thence. Philo ^F16 speaks of Eve's serpent, as (anyrwpou fonwnta) , "a murderer of man"; applying to this purpose the text before referred to, ( Genesis 3:15 ) ;

and abode not in the truth;
neither in the integrity, innocence, and holiness, in which he was created; nor in veracity, or as a creature of veracity, but spake lies, and formed one, by which he deceived Eve, saying, "ye shall not surely die", ( Genesis 3:4 ) , when God had said they should, ( Genesis 2:17 ) ; nor in the truth of the Gospel, which was at least in part made known unto him; particularly that the Son of God should become man, and in that nature be the head of angels and men: this he and his associates, in the pride of their hearts, not bearing that the human nature should be exalted above that of theirs, left their first estate, broke off their allegiance to God, and turned rebels against him:

because there is no truth in him;
not that this is a reason why he continued not in the truth, for there was originally truth in him; though he abode not in it; but a reason, showing there was none in him now, since he was fallen from it, and abode not in it; there is no truth in him, that is natural and genuine, and essential to him; and if at any time he speaks it, it is not from his heart, but because he is forced to it, or has an evil design in it:

when he speaketh a lie, he speaketh of his own;
that is genuine and natural, of his own devising, willing, and approving:

for he is a liar, and the father of it;
he was a liar, as early as he was a murderer, or rather earlier; it was with a lie he deceived, and so murdered our first parents, and he has continued so ever since; he was the first author of a lie; the first lie that ever was told, was told by him; he was the first inventor of one; he was the first of that trade; in this sense the word "father" is used, ( Genesis 4:20 Genesis 4:21 ) ; so the serpent is by the Cabalistic Jews ^F17 called, the lip of lie, or the lying lip.