Galatians 3:20

The meaning of this verse has drawn numerous different explanations. [Note: Lightfoot, p. 146, mentioned 250 to 300, and Charles J. Ellicott, A Critical and Grammatical Commentary on St. Paul’s Epistle to the Galatians, with a Revised Translation, p. 83, estimated over 400.] I think Paul probably meant that a mediator (here the angels, Galatians 3:19) is necessary when two parties make an agreement in which they both assume responsibilities, as in the reciprocal Mosaic Covenant. However a mediator is not necessary when the covenant is unilateral, as when God made the unconditional Abrahamic Covenant.