When 'islands' are contrasted to 'earth' or 'mountains,' they signify the truths of faith, because they are in the sea. They signify doctrinal things which are rituals. 'Islands' signify peoples who are more remote from the worship of God. People who are steeped in the internal sense of the Word, such as angels, do not know what islands are, because they no longer have any concept of such places. Instead they have a perception of more remote worship, like the gentiles outside the church.

'Islands,' in Ezekiel 27:6, signify people in the church in a natural, materially-oriented state but still rational.

(References: Apocalypse Explained 406; Isaiah 1, Isaiah 49, 49:1)

6322. To all outward appearance the external senses, such as sight and hearing, flow into thought and initiate mental images there. For the appearance is that external objects activate the senses, first the external senses, then the internal ones, and speech too. But no matter how convincing that appearance may be, it is nevertheless a misconception. For what is external, being gross and material, cannot flow in and activate what is internal, which is pure and spiritual; that would be contrary to the nature of things. It is the power of the inward senses, a power belonging to the spirit itself, that perceives things, and it does so by means of the power of the outward senses. It is also the power of the inward senses that disposes an outward sensory organ to receive impressions of objects at its bidding. So it is that outward sensory organs - such as that of sight, which is the eye - instantly adapt themselves to all the objects of the senses. Nothing of this could happen in sensory organs without the inflow they receive from within; for all the fibres and small appendages, which are very many around each sensory organ, are instantly attuned to the nature of the object. Indeed the organ itself is also immediately conditioned to conform.

[2] Discussion regarding this appearance has often taken place among spirits, and on every occasion angels have responded by saying that influx does not take place from external things into internal ones at all, only from internal ones into external. This, they have said, is in accordance with order, contrary to which no influx can take place. Two or three times I have seen spirits who have been separated from association with angels because they have been led by outward appearances to believe that such influx from external things into internal ones does exist, thus that influx is physical, not spiritual. The reason why they had been separated was that they might have come to the conclusion that the hells which concern themselves with external things could flow into the heavens which concern themselves with internal ones. They might also have concluded that life did not flow in from the Lord, when in fact He is the source of all inflowing life, because He exists at the inmost point and in relation to Him everything else is external.