Arcana Coelestia # 394
394. Now because this was foreseen and provision was made that the human race should not perish in eternal death, it is here said that 'nobody should do violence to Cain', who means separated faith. It is also said that a sign was put on him', that is, the Lord distinguished faith in a special way to ensure its preservation. These points are arcana which have not yet been disclosed. They are what the Lord meant in Matthew when He spoke about marriage and about eunuchs,
There are eunuchs who were born so from their mother's womb, and there are eunuchs who have been made eunuchs by men, and there are eunuchs who have made themselves eunuchs for the sake of the kingdom of God. He who is able to receive this let him receive it. Matthew 19:12.
People with whom the heavenly marriage exists are called 'eunuchs'. 'Eunuchs born from the womb' are like celestial angels, 'those made so by men' are like spiritual angels, 'those who have made themselves eunuchs' are like angelic spirits, who are moved not so much by charity as by obedience.
Daniel 9:24-25
24
Seventy weeks are decreed on your people and on your holy city, to finish disobedience, and to make an end of sins, and to make reconciliation for iniquity, and to bring in everlasting righteousness, and to seal up vision and prophecy, and to anoint the most holy.
25
Know therefore and discern, that from the going forth of the commandment to restore and to build Jerusalem to the Anointed One, the prince, shall be seven weeks, and sixty-two weeks: it shall be built again, with street and moat, even in troubled times.