Jay used Paul's formula 'one God, the Father' and 'one Lord, Jesus Christ' to defend his monarchal Trinitarian distinction rather than concede Unitarianism.
Scripture spotlight
1 Corinthians 8:6
bible
6 yet to us there is one God, the Father, of whom are all things, and we for him; and one Lord, Jesus Christ, through whom are all things, and we live through him.
Used in debate over creation to distinguish 'from whom are all things' and 'through whom are all things,' with one side arguing this makes the Father source and the Son agent, and the other rejecting that limitation.
Cited to argue that calling the Father the one God and Jesus the one Lord distinguishes persons without denying the Son's deity.
Cited to argue that calling the Father "God" and Jesus "Lord" distinguishes the persons without denying the Son's full deity.
Used to argue that Paul teaches belief in one God the Father, so his message aligns with earlier biblical revelation rather than overturning it.