Но посредник при одном не бывает, а Бог один.
A mediator, however, implies more than one party; but God is one.
Now an intermediary implies more than one, but God is one.
Now a mediator is not for one party only; whereas God is only one.
Now a mediator is helpful if more than one party must reach an agreement. But God, who is one, did not use a mediator when he gave his promise to Abraham.
Now a mediator is not a mediator of one, but God is one.
Now a mediator does not mediate for one only, but God is one.
But a mediator is not of one, but God is one.