2171. 'Abraham hastened towards the tent to Sarah' means the Lord's rational good joined to His truth. This is clear from the representation of 'Abraham' and also of 'Sarah' and from the meaning of 'the tent', dealt with in the three paragraphs following this. Just as the meaning of any single detail in the Word is determined by whatever the subject is in the internal sense, so it is with the details here; that is to say, they relate specifically to the Divine perception into which the Lord entered when the perception of the human existed with Him. But people who do not know what perception is cannot know what it entails, still less that degrees of perception more and more interior exist - natural perception, then rational perception, and finally internal perception which is Divine and which only the Lord has had. Those who have perception, as angels do, know very well what their degree of perception is, whether it is natural, or rational, or a more interior perception still, which to them is Divine. How then must it have been with the Lord, whose perception came from the Supreme and Infinite Divine itself, dealt with in 1616 (end), 1791? Angels never possess such perception as He had, for their perception flows into them from the Lord's Supreme or Infinite Divine by way of His Human Essence. The reason the Lord's perception is described is that when He was in the Human it was in this way made known to Him how the Divine itself, the Divine Human, and the Holy proceeding were to be united within Him; then how His Rational would be made Divine; and finally the nature of the human race which was to be saved through Him, that is, through the union of the Human Essence and the Divine Essence within Him. These are the matters dealt with in this chapter. It is on account of these that the Lord's perception is first described here, and also on account of the union itself which was to be effected.

1387. I have spoken on several occasions about perception to those in the next life who, while they lived in the world, imagined that they had the ability to see into and understand all things. I told them that angels perceive that they think and speak, will and act, from the Lord; but they were still unable to envisage what perception was, for they imagined that if all things flowed in from Him in that way they would be bereft of all life. They would be bereft of it because they would not think anything from themselves or from their proprium - in which activity they made life consist - and so it would be another who did the thinking and not they themselves, so that they would be organs without any life in them. They were told however that so far as life is concerned the difference between having perception and not having it is like the difference between darkness and light, and that people first begin to feel alive when they are receiving such perception, for in that case they live from the Lord yet also have a proprium, which is imparted to them together with every happiness and delight. They were also shown from much experience what perception really was, during which time they acknowledged the existence of it. But after a while they again had no knowledge of it, and doubted and denied its existence. This made clear how difficult it is for man to grasp what perception is.