On Wednesday, the scripture reading for the Office of Readings was as follows:
Concerning the gift of the Law
Consider, brothers, what happens in ordinary life. If a will has been drawn up in due form, no one is allowed to disregard it or add to it. Now the promises were addressed to Abraham and to his descendants – notice, in passing, that scripture does not use a plural word as if there were several descendants, it uses the singular: to his posterity, which is Christ. But my point is this: once God had expressed his will in due form, no law that came four hundred and thirty years later could cancel that and make the promise meaningless. If you inherit something as a legal right, it does not come to you as the result of a promise, and it was precisely in the form of a promise that God made his gift to Abraham.
What then was the purpose of adding the Law? This was done to specify crimes, until the posterity came to whom the promise was addressed. The Law was promulgated by angels, assisted by an intermediary. Now there can only be an intermediary between two parties, yet God is one. Does this mean that there is opposition between the Law and the promises of God? Of course not. We could have been justified by the Law if the Law we were given had been capable of giving life, but it is not: scripture makes no exceptions when it says that sin is master everywhere. In this way the promise can only be given through faith in Jesus Christ and can only be given to those who have this faith.
Before faith came, we were allowed no freedom by the Law; we were being looked after till faith was revealed. The Law was to be our guardian until the Christ came and we could be justified by faith. Now that that time has come we are no longer under that guardian, and you are, all of you, sons of God through faith in Christ Jesus. All baptised in Christ, you have all clothed yourselves in Christ, and there are no more distinctions between Jew and Greek, slave and free, male and female, but all of you are one in Christ Jesus. Merely by belonging to Christ you are the posterity of Abraham, the heirs he was promised.
Let me put this another way: an heir, even if he has actually inherited everything, is no different from a slave for as long as he remains a child. He is under the control of guardians and administrators until he reaches the age fixed by his father. Now before we came of age we were as good as slaves to the elemental principles of this world, but when the appointed time came, God sent his Son, born of a woman, born a subject of the Law, to redeem the subjects of the Law and to enable us to be adopted as sons. The proof that you are sons is that God has sent the Spirit of his Son into our hearts: the Spirit that cries, ‘Abba, Father’, and it is this that makes you a son, you are not a slave any more; and if God has made you son, then he has made you heir.
I had trouble understanding this scripture passage. Could someone kindly interpret it in accordance with the teachings of the Church?
Thank you kindly for your help, and God Bless.