Galatians 3:15

"To speak after the manner of men" means to use human examples. Having founded his argument on the Scriptures, on the miracles wrought among themselves, on the sufferings of Christ, and on the Patriarch, he proceeds to common usages; and this he does invariably, in order to sweeten his discourse, and render it more acceptable and intelligible to the duller sort. Thus he argues with the Corinthians, "Who feedeth a flock, and eateth not of the milk of the flock? Who planteth a vineyard, and eateth not the fruit thereof?" and again with the Hebrews, "For a testament is of force where there hath been death; for doth it ever avail while he that made it liveth?" One may find him dwelling with pleasure on such arguments. In the Old Testament God does the same thing in many instances, as, "Can a woman forget her sucking child?" and again, "Shall the clay say to him that fashioneth it, What makest thou?" and in Hosea, He represents a husband set at nought by his wife. This use of human examples frequently occurs in types also, as when the prophet takes the girdle, and goes down to the potter's house. The meaning of the present example is, that Faith is more ancient than the Law, which is later and only temporary, and delivered in order to pave the way for Faith. Hence he says, "Brethren, I speak after the manner of men;" above he had called them "foolish," now he calls them "brethren," at once chiding and encouraging them. "Though it be but a man's covenant, yet when it hath been confirmed." If a man, says he, makes a covenant, does any one dare to come afterwards and overturn it, or subjoin aught to it? for this is the meaning of "or addeth thereto." Much less then when God makes a covenant; and with whom did God make a covenant?

Having proved by authority that the Law does not justify and is not necessary for justification, which is through faith, the Apostle then proves the same point with human reasons. Concerning this he does four things: First, he mentions a human custom; Secondly, he touches …

He called them foolish above, but now he calls them brothers—there restraining, and here consoling. I am going to present you, he says, a human example. Paul wants to show that faith is a covenant more ancient than the law, and that it would be …

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.

The original word diatheke signifies both a covenant and a testament. Now the promise made to Abraham was rather a testament than a covenant. When a testament has become of force by the death of the testator, it is not capable of being altered; and therefore, the promise that was given to Abraham being of the nature of a testament, it remains firm and unalterable.

Brethren,....

Faith had the precedence of the law, for Abraham was justified by faith. It was a promise that he built upon, and promises are the proper objects of faith.

Brethren, I speak after the manner of men - I draw an illustration from what actually occurs among people. The illustration is, that when a contract or agreement is made by people involving obligations and promises, no one can add to it or take from it. It will remain as it was originally made. So with God. He made a solemn promise to Abraham. That promise pertained to his posterity. The blessing was connected with that promise, and it was of the nature of a compact with Abraham.

Much less would the righteous God do so. The law is here, by personification, regarded as a second person, distinct from, and subsequent to, the promise of God. The promise is everlasting, and more peculiarly belongs to God.

I speak after the manner of men - I am about to produce an example taken from civil transactions. If it be confirmed - If an agreement or bond be signed, sealed, and witnessed, and, in this country, being first duly stamped; No man disannulleth - It stands under the protection of the civil law, and nothing can be legally erased or added.