7870. 'On that night' means their state - a state of evil. This is clear from the meaning of 'night' as a state when there is nothing but evil and falsity. For night describes the opposite of day and thick darkness the opposite of [clear] light, and 'day' and '[clear] light' mean a state in which truth and good reign. This being so, 'night' also means the last phase of the Church, for at that time falsities and evils reign because there is no faith or charity, see 2353, 6000. In addition 'night' means when vastation is completed, 7776, and also damnation, 7851. From all this it is evident that the state of those who are in hell is called 'night'. Not that the thick darkness of night envelops them, for they can see one another. But since the state of truth and good which exists in heaven is called 'day', the state of falsity and evil is called 'night'. Also thick darkness exists in hell when any light at all from heaven flows into it; for then the inferior light which they see by is reduced to nothing and becomes thick darkness.

[2] The source of the inferior light they see by is, it is true, light from the Lord coming through heaven; for in the next life no light comes from anywhere else. But among those in hell that light from Him enters by way of the ability to understand what is true. The ability enabling them to understand remains with them, as it does with every human being, however much they may be steeped in evil or falsity. But when that heavenly light passes on into their will - that is to say, into unwillingness to understand - and consequently passes into the evil and falsity that reside with them, the heavenly light is turned for them into inferior light resembling that emitted from a coal fire. And, as has been stated, that inferior light is converted into utterly thick darkness by the light of heaven when this flows into it. Regarding the inferior light in hell, its being like that emitted from a coal fire, see 1528, 3340, 4418, 4571; and regarding its conversion into thick darkness at the presence of the light of heaven, 1783, 3412, 4533, 5057, 5058, 6000. From all this it may be recognized that in the next life the kind of light each one has depends on whether his ability to understand is furnished with truths springing from good or with falsities arising from evil.

5058. There was another spirit who in the world had been one of the quite distinguished. I had been acquainted with him then, though not with what he was like inwardly. In the next life however, after his state of life underwent a number of changes, he was shown to be deceitful. Having been some while among deceitful ones in the next life and having suffered severely there, he wished to be parted from them. I heard him saying at this time that he wished to enter heaven, for he too had believed that acceptance there was attributable to mercy alone. But he was told that if he entered heaven he would not be able to remain there and that he would suffer torment like those in the world experiencing death-throes. But in spite of being told this he persisted with his desire. He was allowed into a community where some of the simple good dwelt, in front overhead. But once he entered that community he began, in keeping with the life he had led, to act cunningly and deceitfully. Soon after this the simple good there started to complain that he was taking away their perception of what was good and true and consequently their delight, and that he was destroying their state as he did so. At that point some light from a more internal heaven was let in. In that light he looked like a devil, with the upper part of his nose horribly disfigured from some dreadful wound; and he also began to suffer torment within himself. Having experienced that torment he thrust himself away from there into hell. From this it is evident that what leads to heaven is not election and acceptance attributable to mercy, but a person's life. Yet every aspect of a life consisting of goodness and every aspect of a faith composed of truth is, so far as those in the world who are recipients of mercy are concerned, attributable to mercy. To them being accepted into heaven is an act of mercy, and these are the ones who are called the elect, 3755 (end), 3900.