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.

1530. The truth of this could be proved to anyone from the Word, for example, when the Lord revealed Himself to Peter, James, and John, for His face at that time shone like the sun and His garments became white as the light, Matthew 17:2. The sole reason why He appeared to them in this way was that their interior sight had been opened. The same is also confirmed from the Prophets, as in Isaiah when reference is being made to the Lord's kingdom in heaven,

The light of the moon will be as the light of the sun, and the light of the sun will be sevenfold, as the light of seven days. Isaiah 30:26.

And in John, where reference is being made to the Lord's kingdom which is called the New Jerusalem,

The city has no need of the sun or of the moon to shed light in it; for the glory of God gives it light, and its lamp is the Lamb. Revelation 21:23.

And elsewhere in the same book,

There will be no night there, nor do they need a lamp or light of the sun, for the Lord God gives them light. Revelation 22:5.

And in addition when the Lord appeared to Moses, Aaron, Nadab, Abihu, and the seventy elders, it is said that they saw the God of Israel under whose feet there was so to speak a paved work of sapphire stone, like the substance of the sky for clearness, Exodus 24:10. Because the Lord's celestial and spiritual appears before the external sight of the angels as the Sun and the Moon, 'the sun' in the Word therefore means what is celestial, and 'the moon' what is spiritual.