Galatians 3:20

“Now a mediator is not a mediator of one, etc..] A mediator supposes two parties he stands between, and these at a distance from, or disagreeing with each other; where there is but one party, there can be no need of, nor any reason for, a mediator; so Christ is the Mediator between God and men, the daysman, (<180933>Job 9:33), that lays his hands upon them both; and Moses, he was the mediator between God and the Israelites: but God is one; not in person, for there are three persons in the Godhead, the Father, the Word, and the Holy Ghost, and these three are one, in nature and essence; so that though there are three persons, there is but one God, and who is the God both of Jews and Gentiles;…”

“"Now a mediator cannot be of one (but must be of two parties whom he mediates between); but God is one" (not two: owing to His essential unity not admitting of an intervening party between Him and those to be blessed; but as the ONE Sovereign, His own representative, giving the blessing directly by promise to Abraham, and, in its fulfilment, to Christ, "the Seed," without new condition, and without a mediator such as the law had). The conclusion understood is, Therefore a mediator cannot appertain to God; and consequently, the law, with its inseparable appendage of a mediator, cannot be the normal way of dealing of God, the one, and unchangeable God, who dealt with Abraham by direct promise,…”

“Now a mediator is not a mediator of one ... - This verse has given great perplexity to commentators. “There is, unquestionably,” says Bloomfield, “no passage in the New Testament that has so much, and to so little purpose, exercised the learning and ingenuity of commentators as the present, which seems to defy all attempts to elicit any satisfactory sense, except by methods so violent as to be almost the same thing as writing the passage afresh.” In regard, however, to the truth of the declarations here - that “a mediator is not a mediator of one,” and that “God is one” - there can be no doubt, and no difficulty. The very idea of a mediator supposes that there are two parties or persons…”

“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. Galatians 3:21”

“3:20 The law, given through angels and a mediator, required agreement between God and the people. The law was conditional, with blessings and curses attached to keeping or not keeping its statutes. In contrast, God gave his promise to Abraham directly; he did not use a mediator. It was God’s unilateral and unconditional commitment. • God, who is one: Paul used the basic Jewish creed (Deut 6:4) to convince Gentile Christians not to become Jewish converts.”

“a mediator is: Job 9:33; Act 12:20; Ti1 2:5 but: Gal 3:17; Gen 15:18, Gen 17:1, Gen 17:2; Deu 6:4; Rom 3:29 Galatians 3:21”