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.

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

150. Internal Meaning of Ezekiel, Chapter 27

1-2 Further concerning the church in respect to knowledges [cognitiones] of truth, which is Tyre. (2)

3-9 The Ancient Church had knowledges of truth and good of every kind and species, and by means of them it had intelligence. (2)

10-11 Truths that protected that church. (2)

12-13 Acquisitions and communications of all the knowledges. (2)

14-20 Knowledge [scientia], intelligence, and wisdom by means of them.

21-23 Divine worship from them. (2)

24-25 Truths and goods of every kind and thus everything of the church acquired by means of them. (2, 17)

26-29 Through natural knowledges [scientiae] they have perished. (2)

30-34 Lamentation over their destruction, (2)

35-36 and that it is the countenance of hell. (2)