420. Upon the earth, nor upon the sea, nor upon any tree, signifies everywhere in the spiritual world, even to its ultimates, in those who have any perception. This is evident from the signification of "the earth," as being the whole spiritual world, consequently all angels and spirits there. This is the signification of "the earth" in the general and nearest sense, because in the spiritual world, the same as on our globe, there are lands, mountains, hills, plains, valleys, and also seas (respecting which see above, n. 304, 342, 413). It is evident also from the signification of the "sea," as being the ultimates of the earth in the spiritual world, because the last boundaries or limits there are seas (respecting which see above, n. 342); also from the signification of "tree," as being perception and also knowledge (of which presently). This being the signification of "earth," "sea," and "tree," the three joined together in one idea signify all things in the spiritual world even to its ultimates in those who have any perception. A "tree" in general signifies perception and knowledge, because a "garden" signifies intelligence, and all intelligence is according to knowledges and a perception of them; this is why each kind of tree signifies something pertaining to knowledge [scientia] and intelligence. Because a "tree" signifies in general perception and knowledge, it also signifies the interiors of the mind with man, and also the whole man; for a man is such as are the interiors that belong to his mind, and these are such as is the perception from knowledges. (That a "tree" signifies the interiors that belong to the mind, and also man himself, see above, n. 109, 110; that a "tree" signifies perception and knowledge, see Arcana Coelestia 103, 2163, 2682, 2722, 2972, 7692; that the ancients had Divine worship in groves under trees, according to their significations, n. 2722, 4552; that this was prohibited with the Jewish nation, and why, n. 2722; that "paradises" and "gardens" signify intelligence, n. 100, 108, 3220; also in the work on Heaven and Hell 176; and above, n. 110)

170. Representations and Appearances in Heaven

Anyone who thinks solely from natural light cannot understand that anything in heaven is like anything in our world. This is because such people, on the basis of this light, have both thought and decided that angels are nothing but minds, and that minds are like ethereal breath. This would mean that angels did not have the senses we do, so they would not have eyes; and if they did not have eyes there would be no objects [of sight]. However, angels do have all the senses we do - far more delicate ones, in fact - and the light in which they see is far brighter than the light in which we see.

On angels being people in a most perfect form with the use of all their senses, see 73-77 above; and on light in heaven being far brighter than the light in our world, see 126-132.