John 7:19

The law of Moses prescribes that you shall not kill, but this law you transgress; for, why do you seek to kill me? You do not observe the law; otherwise you would learn from that law, that I am the Christ, and not seek to put me to death, when I appear amongst you. (St. Augustine, tract. 30, in Joan.) — If I cure on the sabbath-day, do not you also give circumcision, and also cure the wound on the sabbath? (Bible de Vence) — See ver. 23, of this chapter.

(1.) He argues against them by way of recrimination, convicting them of far worse practices, v. 19. How could they for shame censure him for a breach of the law of Moses, when they themselves were such notorious breakers of it? Did not Moses give you the law? And it was their privilege that they had the law, no nation had such a law; but it was their wickedness that none of them kept the law, that they rebelled against it, and lived contrary to it. Many that have the law given them, when they have it do not keep it. Their neglect of the law was universal: None of you keepeth it: neither those of them that were in posts of honour, who should have been most knowing, nor those who were in posts of subjection, who should have been most obedient. They boasted of the law, and pretended a zeal for it, and were enraged at Christ for seeming to transgress it, and yet none of them kept it; like those who say that they are for the church, and yet never go to church. It was an aggravation of their wickedness, in persecuting Christ for breaking the law, that they themselves did not keep it: "None of you keepeth the law, why then go ye about to kill me for not keeping it?" Note, Those are commonly most censorious of others who are most faulty themselves. Thus hypocrites, who are forward to pull a mote out of their brother's eye, are not aware of a beam in their own. Why go ye about to kill me? Some take this as the evidence of their not keeping the law: "You keep not the law; if you did, you would understand yourselves better than to go about to kill me for doing a good work." Those that support themselves and their interest by persecution and violence, whatever they pretend (though they may call themselves custodes utriusque tabulæ—the guardians of both tables), are not keepers of the law of God. Chemnitius understands this as a reason why it was time to supersede the law of Moses by the gospel, because the law was found insufficient to restrain sin: "Moses gave you the law, but you do not keep it, nor are kept by it from the greatest wickedness; there is therefore need of a clearer light and better law to be brought in; why then do you aim to kill me for introducing it?"

Verses 14-24 Every faithful minister may humbly adopt Christ's words. His doctrine is not his own finding out, but is from God's word, through the teaching of his Spirit. And amidst the disputes which disturb the world, if any man, of any nation, seeks to do the will of God, he shall know whether the doctrine is of God, or whether men speak of themselves. Only those who hate the truth shall be given up to errors which will be fatal. Surely it was as agreeable to the design of the sabbath to restore health to the afflicted, as to administer an outward rite. Jesus told them to decide on his conduct according to the spiritual import of the Divine law. We must not judge concerning any by their outward appearance, but by their worth, and by the gifts and graces of God's Spirit in them.