Apocalypse Explained # 144
144. Or else I will come unto thee quickly, and will fight against them with the sword of my mouth. That this signifies, if not, when visitation comes, that they shall be dispersed, is evident from the signification of, I will come to thee quickly, when said of the Lord, as being visitation, concerning which more will be said in what follows, and from the signification of the sword of my mouth, as being truth combating against falsity, and then dispersion of falsities (concerning which see above, n. 73, 131). Here, however, it signifies the dispersion of those who hold the doctrine of Balaam, and the doctrine of the Nicolaitanes, that is, of those who have the understanding enlightened and teach truths, and yet love to destroy by guile those who belong to the church; also those who separate good from truth, or charity from faith (concerning whom see above, n. 140 and 142). The reason why coming quickly denotes visitation is, that the coming of the Lord in the Word signifies visitation (as may be seen, Arcana Coelestia 6895). Visitation is the exploration of man after death as to his quality, before he is judged.
Matthew 24:30
30
and then the sign of the Son of Man will appear in the sky. Then all the tribes of the earth will mourn, and they will see the Son of Man coming on the clouds of the sky with power and great glory.