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.
Arcana Coelestia #9862
9862. 'A span the length of it, and a span the breadth of it' means equally in respect of good and in respect of truth. This is clear from the meaning of 'the length' as good, dealt with in 1613, 9487; and from the meaning of 'the breadth' as truth, dealt with in 1613, 3433, 3434, 4482, 9487. Equally in respect of both these is meant by the length and the breadth, that they were equal.