3 

3:15 I speak after the manner of men - I illustrate this by a familiar instance, taken from the practice of men.Though it be but a man's covenant, yet, if it be once legally confirmed, none - No, not the covenanter himself, unless something unforeseen occur, which cannot be the case with God. Disannulleth, or addeth thereto - Any new conditions.

3:16 Now the promises were made to Abraham and his seed - Several promises were made to Abraham; but the chief of all, and which was several times repeated, was that of the blessing through Christ. He - That is, God.Saith not, And to seeds, as of many - As if the promise were made to several kinds of seed. But as of one - That is, one kind of seed, one posterity, one kind of sons. And to all these the blessing belonged by promise. Which is Christ - including all that believe in him. Gen 22:18.

3:17 And this I say - What I mean is this. The covenant which was before confirmed of God - By the promise itself, by the repetition of it, and by a solemn oath, concerning the blessing all nations. Through Christ, the law which was four hundred and thirty years after - Counting from the time when the promise was first made to Abraham, Gen 12:2,$3.Doth not disannul, so as to make the promise of no effect - With regard to all nations, if only the Jewish were to receive it; yea, with regard to them also, if it was by works, so as to supersede it, and introduce another way of obtaining the blessing.

3:18 And again - This is a new argument. The former was drawn from the time, this from the nature, of the transaction. If the eternal inheritance be obtained by keeping the law, it is no more by virtue of the free promise - These being just opposite to each other. But it is by promise.Therefore it is not by the law.

3:19 It - The ceremonial law. Was added - To the promise.Because of transgressions - Probably, the yoke of the ceremonial law was inflicted as a punishment for the national sin of idolatry, Exo 32:1, at least the more grievous parts of it; and the whole of it was a prophetic type of Christ. The moral law was added to the promise to discover and restrain transgressions, to convince men of their guilt, and need of the promise, and give some check to sin. And this law passeth not away; but the ceremonial law was only introduced till Christ, the seed to or through whom the promise was made, should come. And it was ordained by angels in the hand of a mediator - It was not given to Israel, like the promise to Abraham, immediately from God himself; but was conveyed by the ministry of angels to Moses, and delivered into his hand as a mediator between God and them, to remind them of the great Mediator.

3:20 Now the mediator is not a mediator of one - There must be two parties, or there can be no mediator between them; but God who made the free promise to Abraham is only one of the parties. The other, Abraham, was not present at the time of Moses. Therefore in the promise Moses had nothing to do. The law, wherein he was concerned, was a transaction of quite another nature.

3:21 Will it follow from hence that the law is against, opposite to, the promises of God? By no means. They are well consistent. But yet the law cannot give life, as the promise doth. If there had been a law which could have given life - Which could have entitled a sinner to life, God would have spared his own Son, and righteousness, or justification. with all the blessings consequent upon it, would have been by that law.

3:22 But, on the contrary, the scripture wherein that law is written hath concluded all under sin - Hath shut them up together, (so the word properly signifies,) as in a prison, under sentence of death, to the end that all being cut off from expecting justification by the law, the promise might be freely given to them that believe.

6 

6:7  Mat 10:1; Luk 9:1.

6:8 He commanded them to take nothing for their journey - That they might be always unincumbered, free, ready for motion. Save a staff only - He that had one might take it; but he that had not was not to provide one, Mat 10:9. Luk 9:3.

6:9 Be shod with sandals - As you usually are. Sandals were pieces of strong leather or wood, tied under the sole of the foot by thongs, something resembling modern clogs. The shoes which they are in St. Matthew forbidden to take, were a kind of short boots, reaching a little above the mid - leg, which were then commonly used in journeys. Our Lord intended by this mission to initiate them into their apostolic work. And it was doubtless an encouragement to them all their life after, to recollect the care which God took of them, when they had left all they had, and went out quite unfurnished for such an expedition. In this view our Lord himself leads them to consider it, Luk 22:35: When I sent you forth without purse or scrip, lacked ye any thing?

6:10  Mat 10:11; Luk 9:4.

6:12  Luk 9:6.

6:13 They anointed with oil many that were sick - Which St. James gives as a general direction, Jam 5:14-15, adding those peremptory words, And the Lord shall heal him - He shall be restored to health: not by the natural efficacy of the oil, but by the supernatural blessing of God. And it seems this was the great standing means of healing, desperate diseases in the Christian Church, long before extreme unction was used or heard of, which bears scarce any resemblance to it; the former being used only as a means of health; the latter only when life is despaired of.