John Darby’s Synopsis
 If a man touched a leper, he was unclean. But here grace works, and Jesus undefilable touches the leper (God in grace, undefilable, but a man touching the defiled thing to cleanse it.
 The call of Peter is more general in this respect, that it is connected with the Person of Christ. Nevertheless, although he was a fisher of men (a word used evidently in contrast with the fishes he was occupied with), he exercised his ministry more particularly with regard to Israel. But it was power in the Person of Christ that governed his heart; so that it was fundamentally, the new thing, but as yet in its connection with Israel, while extending beyond them. It is at the end of chapter 7 and in chapter 8 that we enter on ground beyond the narrow limits of Israel.
 Compare Job 33, 36 and James 5:14, 15-the first outside dispensations, and James under Christianity. In Israel, it is the Lord Himself in sovereign grace.
 Christ, born under the law, was subject to them; but that is a different thing. Here it is a divine power acting in grace.
 But here also the Lord, in giving the reasons why the disciples did not follow the ordinances, and the institutions, of John and of the Pharisees, connects them with the two principles already pointed out-His position in the midst of Israel, and the power of grace which went beyond its limits. The Messiah, Jehovah Himself, was among them, in this grace (in spite of their failure under the law, in spite of their subjection to the Gentiles) according to which Jehovah named Himself "I am the Lord that healeth thee." At least, He was there in the supremacy of grace for faith. Those therefore who owned Him as the Messiah, the husband of Israel, could they fast while He was with them? He would leave them: without doubt that would be their time to fast. Moreover, secondly, it is always impossible. He could not adapt the new cloth of Christianity to the old garment of Judaism, in its nature incapable of receiving its energy, or adapting itself to grace, worn out withal as a dispensation by sin, and under which Israel was, in judgment, made subject to the Gentiles. Besides, the power of the Spirit of God in grace could not be restricted to the ordinances of the law. It would destroy them by its very strength. The call of Levi violated, and most openly, all the prejudices of the Jews. Their own fellow-countrymen were the instruments of their masters' extortion, and reminded them in the most painful manner of their subjection to the Gentiles. But the Lord was there in grace to seek sinners. That which the Holy Ghost sets before us is the presence of the Lord, and the rights which are necessarily attached to His Person and to His sovereign grace, which had come into Israel, but necessarily went beyond its limits (setting aside, consequently, the legal system which could not receive the new thing). This is the key to all these narratives. Thus, also, in that which follows respecting the sabbath, the one case shews the supremacy which His glorious Person gave Him over that which was the sign of the covenant itself; and the other, that the goodness of God cannot abdicate its rights and its nature. He would do good even on a sabbath-day.