Apocalypse Explained #572
572. That they should slay the third part of men.- That this signifies of depriving themselves of all understanding of truth, and thence of spiritual life, is evident from the signification of slaying as denoting to deprive of spiritual life, concerning which, see above (n. 547); and from the signification of men, as denoting the understanding of truth (see also above, n. 546, 547). That the third part, when used in reference to truths, denotes all, may be seen above (n. 506). Here, therefore, by slaying the third part of men, is signified deprivation of all understanding of truth. It is said that they deprive themselves, because those who have become sensual through evils of life and falsities of doctrine by reasonings from fallacies, deprive themselves of the understanding of truth, but not others, except those who are also sensual. The reason why they thence deprive themselves of spiritual life, is, that man acquires spiritual life through the understanding, for in the measure that the understanding is opened by truths, and suffers itself to be enlightened, in the same measure, man becomes spiritual. But the understanding is opened by means of truths from good, but not by means of truths without good; for so far as man lives in the good of love and of charity, so far he thinks truths; for truth is the form of good, and all good with man pertains to his will, and all truth pertains to his understanding, therefore the good of the will manifests its form in the understanding; the form itself is thought from the understanding originating in the will.
Heaven and Hell #123
123. Since the Lord does appear in heaven as a sun because of the divine love that is in him and from him, all the people there constantly turn toward him. The inhabitants of the heavenly kingdom turn toward him as the sun, while the inhabitants of the spiritual kingdom turn toward him as the moon. In contrast, the inhabitants of hell turn toward the darkness and dimness that are on the opposite side, and therefore turn away from the Lord. This is because all the people who are in the hells are caught up in love for themselves and the world and are therefore opposed to the Lord. The ones who turn toward the darkness that stands for our world's sun are at the back of the hells and are called "demons," while the ones who turn toward the dimness that stands for our moon are in the front of hell and are called "spirits." This is why people in the hells are described as being in darkness and people in the heavens as being in light. "Darkness" means falsity arising from evil, and "light" means truth arising from good.
The reason people turn in this way is that in the other life we all look toward what rules in our deeper natures - toward our own loves, then; and these deeper natures form the faces of angels and spirits. Further, in a spiritual world the cardinal points are not fixed the way they are in a natural world. Instead, they are determined by the way people face.
We ourselves, in spirit, are also turning in the same fashion - away from the Lord if we are caught up in self-love and love of the world, and toward him if we are in a love for him and for our neighbor. We are unaware of this, though, because we are in a natural world where the cardinal points are determined by the sun's rising and setting. Since it is hard for people to grasp this, examples will be given below where we deal with the cardinal points and with space and time in heaven.