^16-18 Now a promise was made to Abraham and to his seed. (Note in passing that the scripture says not “and to seeds” but uses the singular ‘and to your seed’, meaning Christ.) I say then that the Law, which came into existence four hundred and thirty years later, cannot render null and void the original “contract” which God had made, and thus rob the promise of its value. For if the receiving of the promised blessing were now made to depend on the Law, that would amount to a cancellation of the original “contract” which God made with Abraham as a promise.

^19-20 Where then lies the point of the Law? It was an addition made to underline the existence and extent of sin until the arrival of the “seed” to whom the promise referred. The Law was inaugurated in the presence of angels and by the hand of a human intermediary. The very fact that there was an intermediary is enough to show that this was not the fulfilling of the promise. For the promise of God needs neither angelic witness nor human intermediary but depends on him alone.