Indeed, what I am about to say I speak according to man, and not according to God. I do not speak in a manner proportioned to revealed wisdom, nor to the powers of those who can be fed with solid food. I speak to those who, because of the tenderness of their stomach, are fed with the moisture of milk and are wholly unable to digest what is great (1 Cor 3:2).
Therefore, when addressing the Corinthians, among whom fornication had been reported, and such fornication as is not even found among the Gentiles, he said: “I say this, not the Lord” (1 Cor 7:12). In the second epistle to the same people he says: “What I speak, I speak not according to the Lord, but as it were in foolishness” (2 Cor 11:17).
Some think that the Apostle said, “Brethren, I speak according to man,” with human testaments in view. They refer this to the death of the testator and to other examples taken from human life.
It seems to me, however, that these words are placed first both for the reason they themselves indicate and especially because of what follows: “He did not say, ‘to seeds,’ as of many, but as of one, ‘and to your seed,’ which is Christ.”
Passing in mind and memory through all the Scriptures, I have nowhere found it written “seeds,” that is, in the plural. It is always in the singular, whether in a good sense or in a bad one.
Likewise, concerning his words, “Now this I call a covenant confirmed by God,” anyone who carefully compares the Hebrew scrolls and the other editions with the translation of the Seventy will find something. Where “covenant” is written, there is a word that means not covenant or testament, but agreement. In Hebrew this is expressed by the word Berith (הידב).
From this it is evident that the Apostle did what he promised. He used not a hidden meaning inaccessible to the Galatians, but an ordinary and simple one. Had the Apostle not warned that he was speaking according to man, this might have displeased intelligent people.
In this place one must understand the years that passed from the time when the Lord said to Abraham, “And in your seed all nations shall be blessed” (Gen 22:18), until the time when Moses the lawgiver appeared.
Did four hundred years actually pass? Or how is it that in Genesis the Lord promises Abraham himself that after four hundred years his descendants would come out of Egypt? This is no small question. It has been investigated by many, though I do not know whether anyone has fully solved it.
The account in the same book concerning Tamar and her two infants agrees with this place (Gen 38). The first, named Zarah, put his hand out from his mother’s womb, and the midwife tied a scarlet thread on it. Then, when that hand drew back, the second, named Phares, put forth his hand.
This means that Israel put forth his hand in the fulfillment of the works of the law. Then, after staining it with the blood of the prophets and of the Savior Himself, he withdrew it. After this the Gentile people came forth.
Scripture very often says of this people that through it the barrier separating Jews and Gentiles was broken down and overthrown. Thus there would be one flock and one shepherd. Thus there would be glory, honor, and peace for everyone who does good, to the Jew first and also to the Greek.
The simple meaning of this passage is as the Apostle teaches. The promise given to Abraham before the law cannot be destroyed by the law given afterward. The later must not be preferred to the earlier.
For four hundred and thirty years earlier the promise was given to Abraham that in him all nations would be blessed. The observance of the law, by which, if anyone fulfills it, he lives in it, was prescribed thirty years later by Moses on Mount Sinai.
Here one may also say the reverse. Why was it necessary to give the law so many years after the promise? After the law was proclaimed, suspicion could arise that the promised agreement had been set aside. Conversely, if the meaning of the promise is preserved, one might think that the law has no importance.
Foreseeing this objection, the Apostle in what follows raises it against himself and gives the answer.