Seven, as in Revelation 15:1, signifies everything in an universal sense. The number 'seven' was considered holy, as is well known, because of the six days of creation, and the seventh, which is the celestial self, where peace, rest, and the Sabbath is. The number seven occurs so frequently in the rites of the Jewish church and is held holy everywhere.

So times were divided into seven, longer and shorter intervals, and were called weeks, like the great intervals of times till the coming of the Messiah, in Daniel 9:24-25. The time of seven years is called 'a week' by Laban and Jacob, as in Genesis 29:27-28. So wherever the number seven occurs, it is considered holy and sacred, as in Psalm 119:164, and in Isaiah 30:26.

As the periods of a person's regeneration are distinguished into six, prior to the seventh, or the celestial self, so the times of vastation are also distinguished, until nothing celestial is left. This was represented by the many captivities of the Jews, and by the last Babylonian captivity, which lasted seven decades, or seventy years. This was also represented by Nebuchadnezzar, in Daniel 4:16, 22, 29. It also refers to the vastation of the end times, in Revelation 15:1, 7-8. They should 'tread the holy city under foot, forty and two months, or six times seven,' as in Revelation 11:2 and Revelation 5:1. So the severity and increments of punishment were expressed by the number seven, as in Leviticus 26:18, 21, 24, 28 and Psalm 79:12.

(Odkazy: Apocalypse Explained 5, 7-8, 15; Arcana Coelestia 395; Daniel 9, 9:24, 9:25; Psalms 119)

7542. 'Onto your heart' means into what is inmost. This is clear from the meaning of 'heart' as that which belongs to a person's will, thus to his love, dealt with in 2930, 3317, 3888, 3889, consequently what is central to the actual life within him; for his love, belonging intrinsically to his will, constitutes that life within him. This is why 'heart' means what is inmost. What is inmost in the case of the good is love to the Lord and love towards the neighbour, whereas what is inmost in the case of the evil is self-love and love of the world. The latter is what is meant here; and what is around it, constituting so to speak the surrounding parts, are the evils and falsities that lend support, arranged into order according to the ways in which they support it. In the next life they are brought out into the open in the order in which they have been arranged. First to come forth are those that occupy the outermost surrounding parts, then those that lie further in; and finally what is inmost is revealed. So it is that a person in the next life passes through a large number of states, and that the evil are afflicted in successive stages by scourges or plagues before they are cast into hell, as accords with what has been stated immediately above. What is inmost, which they come to last of all, is hell itself residing with them, for it is the evil that had been central to their love, and so the end which they held in view in everything they did and which in the world they had kept deeply hidden within them.