3493. 'And his eyes were becoming dark so that he could not see' means when the Rational wished to enlighten the Natural from the Divine. This is clear from the meaning of 'the eyes' as interior or rational sight, dealt with in 2701, and from the meaning of 'seeing' as recognizing and understanding, dealt with in 2150, 2325, 2807. Consequently when 'the eyes' are said 'to be becoming dark' the meaning is that no discernment exists any longer, in this case no discernment of the things present in the natural. This being the meaning of these words, the fact that the Rational wished to enlighten the Natural from the Divine is meant. What this implies may be seen from the following things stated and shown already about the rational and the natural with man when he is being regenerated: The rational is regenerated before the natural, for the reason that the rational is interior and so closer to the Divine, and also is purer and so more suited to receiving the Divine than the natural is; and for the further reason that the natural has to be regenerated by way of the rational, see 3286, 3288, 3321.

[2] When therefore the rational has been regenerated but not the natural the former in that case seems to itself to be made dark, for no correspondence exists between the two. Actually the rational receives its sight from the light of heaven, whereas the natural receives its sight from the light of the world; but unless a correspondence exists between the two the rational is unable to see anything that is in the natural. Everything there is like shadow or even like thick darkness. But once a correspondence does exist, things that are in light in the natural are then apparent to the rational, for things that belong to the light of the world are then enlightened by those that belong to the light of heaven, which are so to speak shining through. But these matters are more clearly evident from what has been stated and shown already about correspondence see 2987, 2989-2991, 3002, 3138, 3167, 3222, 3223, 3225, 3337, 3485. Through what is stated and shown in these paragraphs one may grasp to some extent that the words 'Isaac's eyes were becoming dark so that he could not see' mean that the Rational wished to enlighten the Natural from the Divine, that is to say, to make even the Natural Divine, for the subject in the highest sense is the Lord. Light is thereby shed on this matter by what occurs with man when he is being regenerated and which has been described already; for man's regeneration is an image of the Lord's glorification, 3043, 3138, 3212, 3296, 3490.

3286. 'On behalf of his wife because she was barren' means that the Divine Natural did not as yet exist. This is clear from the meaning of 'a wife' as Divine Truth joined to the Divine Good of the Rational, which Truth, as shown in the previous chapter, is represented by 'Rebekah'; and from the meaning of 'barren' as the non-existence as yet of the Divine Natural. For the truth of the matter is that the Divine Natural came into being from the Divine Good of the Rational as the father and from Divine Truth there as the mother. While the Divine Natural does not as yet exist the Truth of the Rational is called 'barren', here 'a barren wife'.

[2] In man's case the situation is that while he is being regenerated the Lord instills good, that is, goodwill to the neighbour, into his rational. This goodwill or good has truth from the natural man allied to it. Once this is completed his natural has still to be regenerated, as anyone may recognize from the fact that the internal or rational man often conflicts with the external or natural; and as long as conflict exists the natural is not regenerate. And while the natural remains unregenerate the rational as regards truth is barren. As is the case in general so it is similarly in every particular instance in which the rational does not agree with the natural; in every such instance the rational as regards truth is called barren.

[3] The work of regeneration revolves for the most part around making the natural man correspond to the rational man, not only in general but also in particular. And the natural man is brought into such correspondence by the Lord by means of the rational. That is to say, good is instilled into the rational, and within this good as the soil truths are planted, after which by means of rational truths the natural is brought into obedience. When it is obedient it in that case corresponds; and to the extent it corresponds a person has been regenerated.