Apocalypse Explained #243
243. And white garments, that thou mayest be clothed, signifies genuine truths and intelligence therefrom. This is evident from the signification of "white garments," as being genuine truths, for garments signify truths (See above, n. 195), and "white" signifies what is genuine, and is predicated of truths (See above, n. 196); also from the signification of "to clothe," as being to acquire intelligence for oneself therefrom, for by means of genuine truths all intelligence is acquired; for the human understanding is formed to receive truths, therefore it becomes such as the truths are out of which it is formed. It is supposed that understanding is also the ability to reason from thought and to speak from falsities, and to confirm falsities by many arguments; but this is not understanding, it is only a faculty granted to man with the memory to which it is adjoined, and of which it is an activity. Yet by means of this faculty the understanding is born and formed, so far as man receives truths from affection; but genuine truths it is not possible for any man to receive from affection except only from the Lord, since they are from Him; consequently, to receive understanding, or to become intelligent, is not given to any man, except only from the Lord, but it is given to everyone who applies himself to receive (according to what was said above, n. 239. This, therefore, is signified by "I counsel thee to buy of Me white garments, that thou mayest be clothed."
Waters
'Waters' particularly signify the spiritual parts of a person, or the intellectual aspects of faith, and also their opposites.
'The waters above the firmament,' as in Genesis 1:7, signify the knowledges in the internal self, and 'the waters beneath the firmament' signify the knowledges of the external self.
'Waters,' as in Ezekiel 47:9, refer to the New Jerusalem, and they signify spiritual things from a celestial origin.
'Many waters,' as in Revelation 17:1, signify truths of the Word adulterated. 'Waters' or 'rivers' signify spiritual, rational, or scientific things pertaining to truth.
'Waters … that go softly,' as in Isaiah 8:6-7, signify spiritual things, and 'waters … strong and many,' signify falsities.
'Waters,' as in Psalms 104:3, signify divine truths.
'Waters' signify truths in the natural self, and in the opposite sense, falsities.
'The waters were dried up from off the earth,' as in Genesis 8:7, signifies the apparent dissipation of falsities.
(Riferimenti: Apocalypse Explained 17; Apocalypse Revealed 50; Genesis 8)