3375. 'And I will fulfil the oath which I swore to Abraham your father' means confirmation. This is clear from the meaning of 'an oath' or 'swearing' as confirmation, dealt with in 2842. Here it does not say that the covenant made with Abraham is to be fulfilled but that 'the oath' will be. The reason for this is that 'a covenant' has reference to what is celestial, which is good, whereas 'an oath' has reference to what is spiritual, namely truths, see 3037; and truths are the subject here. For the same reason also in verse 31 below it is not said of Isaac that he made a covenant with Abimelech but that 'he swore to him, a man to his brother', whereas in Genesis 21:32 it is said of Abraham that he and Abimelech 'made a covenant'; see Psalms 105:9. By the confirmation here which is meant by 'an oath' is understood the Lord's being joined to those who are in His kingdom, for an oath is the confirmation of a covenant, and by 'a covenant' is meant being joined together, 665, 666, 1023, 1038, 1864, 1996, 2003, 2021.

1023. That 'and I, behold I am establishing My covenant' means the Lord's presence in charity becomes clear from the meaning of 'a covenant', dealt with in 666, where it was shown that 'a covenant' means regeneration, and in particular the conjunction of the Lord with a regenerate person by means of love. It was also shown there that the heavenly marriage is the actual covenant itself, and that consequently the heavenly marriage exists with every regenerate person. The nature of this marriage or covenant has also been shown already.

[2] The heavenly marriage with the member of the Most Ancient Church existed in the area of his own will, but the heavenly marriage with the member of the Ancient Church came into existence in the area of his own understanding. Actually when the will part of man's mind had become utterly corrupted, the Lord in miraculous fashion separated the area of his own understanding from that corrupted will part, and within the area of man's own understanding He formed a new will, which is conscience. Into conscience He infused charity, and into charity innocence, and in this manner joined Himself to man, or what amounts to the same, established a covenant with him.

[3] To the extent that the area of a person's own will can be separated from this understanding part the Lord is able to be present with him, that is, to join Himself or establish a covenant with him. Temptations and similar means of regeneration render inactive the area of a person's own will, so that it is reduced to nothing and so to speak dies. To the extent that this happens the Lord can operate within charity by means of conscience implanted in the area of a person's own understanding. This is what is called 'a covenant' here.