262. As of a trumpet speaking with me, signifies clear and manifest. This is evident from the signification of "trumpet," as being Divine truth manifested and revealed out of heaven (of which above, n. 55. A voice that is heard out of heaven with those who are in the spirit is heard usually as a human voice; but it was heard "as a trumpet speaking" because it was clearly and manifestly perceived by the angels, and what is clearly and manifestly perceived by them falls loudly into the hearing of the spirit; and this was done with John that his attention might be awakened, and thence his sight, lest anything should be obscure to him. This is meant by "the voice of a trumpet" in other places also (Matthew 24:31; Zechariah 9:14; Psalms 47:5; Revelation 8:2, 7-8, 13; 9:1, 13-14; 10:7; 18:22).

'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.

(Odkazy: Apocalypse Explained 17; Apocalypse Revealed 50; Genesis 8)