8108. 'And by night in a pillar of fire to give them light' means that when there was a state of dimness, this was moderated by enlightenment from good. This is clear from the meaning of 'night' as a state of obscurity or dimness, dealt with in 1712, 6000; from the meaning of 'fire' as the good of love, dealt with in 934, 4906, 5215, 6314, 6832, 6834, 6849, 7324, 7852; and from the meaning of 'giving light' as enlightenment. The reason why Jehovah or the Lord appeared or led the way in a pillar of cloud during the daytime and in a pillar of fire by night was that the state of heaven was represented thereby. In heaven variations and changes of state occur unceasingly; for angels are being perfected constantly, and without unceasing changes of states this perfecting could not possibly take place. In general those variations and changes are like the cyclic changes in the world - like the round of yearly seasons, which are spring, summer, autumn, winter, and spring again, and like the round of times of day, which are morning, midday, evening, night, and morning again. Morning and midday in heaven occurs when the understanding is being enlightened by the Lord; but in this state the light is moderated by a dimming of truth, as if by a cloud. And evening and night there occur when the understanding grows dim; but the Lord moderates that dimness by means of the good of love, as if by means of a fire giving light. These provisions by the Lord are what were represented by the pillar of cloud during the daytime, and the pillar of fire by night, present with the children of Israel in the wilderness.