Apocalypse Explained # 207
207. (Verse 8) I know thy works. That this signifies the life of charity, is evident from the signification of works, as being those things which belong to man's love, and thus to his life (concerning which see above, n. 98, 116, 185). Here, therefore, they denote the things of charity, because these are treated of in what is written to this church.
Arcana Coelestia # 9165
9165. 'And no one sees it' means which the mind is not aware of. This is clear from the meaning of 'seeing' as understanding, also possessing faith, dealt with in 2325, 2807, 3863, 3869, 4403-4421, 5114, 5400. And since the understanding is the eye of the mind, 'seeing' also means that which the mind is aware of. At this point that which the mind is not aware of is meant since the words used are 'no one sees it'.