And Jesus answered him,
The first of all the commandments is, Hear, O Israel; The Lord our God is one Lord:
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Athanasius the Apostolic
AD 373
Since God is one, it is ridiculous to suppose that there could be still another “Lord” of heaven and earth in addition to the Lord who is one. There is simply no room for a second Lord of all, if the one true God fills all things in the compass of heaven and earth.
This is the first commandment; land the second is like unto it: Thou shall love thy neighbour as thyself. On these two commandments hang all the law and the prophets.".
So also the Lord, in His Gospel, makes mention of the first and second commandment, saying, "Hear, O Israel, The Lord thy God is one God; "
Literally the Lord our God is the only Lord: and this is the sense of the text in Deuteronomy vi. 4. The word in the original text, rendered by the term Lord, is the grand name JEHOVA, which signifies properly God, considered as the supreme Being, or the author of all existence.
If sacred truth, when challenged by blasphemy, is met by silence, even that silence may be falsely construed as consent. This is what has happened in the case of the Arian assertion that because God is one, therefore his Son is not God…. The same one who authorizes us to confess the Son of God as God justifies us in proclaiming the one God.
For Moses, the faithful servant of God, when he said, "The Lord thy God is one Lord".
There is then one God and Father, and not two or three; One who is; and there is no other besides Him, the only true