Apocalypse Explained #241
241. (Revelation 3:18) I counsel thee. That this signifies the means of reformation of those who hold the doctrine of faith alone, is evident from the things that now follow; for the reformation of those who are in that doctrine is now treated of; hence, I counsel thee, involves precepts how they ought to live in order that they may be reformed, and so be saved.
Apocalypse Explained #125
125. Be thou faithful unto death. That this signifies continuance in truths to the end, is evident without explanation. It is said, unto death, because such as a man is when he dies, such he remains to eternity; the life which he before lived is only the life of the formation of his spirit (concerning which fact many things may be seen in the work, Heaven and Hell 470-484).