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.

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

233. Investigating mysteries of faith by means of facts is as impossible as it is for a camel to go through the eye of a needle, or for a rib to control the tiniest fibres of the chest and the heart. Just as gross, indeed far more gross, is what is sensory and factual in comparison with what is spiritual and celestial. Anyone who wishes to probe merely the secrets of nature, which are countless, discovers scarcely a single one, and when he starts to probe he sinks, as is well known, into falsities. What then would happen if he wished to probe the secrets of spiritual and celestial life, where thousands and thousands of secrets exist for each one contained in the unseen parts of nature?

[2] To illustrate the point, let just one example be taken. Of himself man is incapable of anything other than doing evil and turning himself away from the Lord. Yet it is not the man who does so but the evil spirits residing with him. Yet again it is not the evil spirits who do it but the evil itself which they have made their own. All the same, man does that evil and turns himself away, and is blameworthy, even though his life comes from the Lord alone. On the other hand man of himself cannot possibly do good and return to the Lord. This is accomplished by angels. Yet the angels cannot do it, but only the Lord. All the same, man is capable as if of himself of doing good and of returning to the Lord. The truth of all this cannot possibly be grasped by the senses, formulated knowledge, or philosophy. If these are consulted they deny those things outright, even though they are inherently true. And the same applies with everything else.

[3] These considerations show that people who consult sensory evidence and factual knowledge in matters of belief plunge themselves not only into doubt but also into denial, that is, into thick darkness. And in plunging into thick darkness they also become immersed in every kind of evil desire, for in believing what is false they also do what is false. And when they believe that the spiritual and the celestial do not exist they believe that only the bodily and the worldly do so. So they love anything that belongs to self and the world, and this is how evil desires and evils themselves arise out of what is false.