'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)

216. "'Be zealous, therefore, and repent.'" This symbolically means, in order for this goal to come about from an affection for truth and an aversion to falsity.

The text here says, "Be zealous," because it said in verse 15 above, "Would that you were cold or hot," and the meaning here is for the angel to be hot; for zeal is a spiritual heat, and spiritual heat is an affection of love, here the affection of a love of truth. Moreover, someone who acts from an affection of the love of truth acts also from an aversion to falsity. Consequently this is the symbolic meaning of the command to repent.

In the Word, when zeal or jealousness is applied to the Lord, it symbolizes both love and anger - love in John 2:17, Psalms 69:9, Isaiah 37:32; 63:15, Ezekiel 39:25, Zechariah 1:14; 8:2, anger in Deuteronomy 32:16, 21, Psalms 79:5-6, Ezekiel 8:3, 5; 16:42; 23:25, Zephaniah 1:18; 3:8.

In the Lord's case, however, zeal or jealousness is not anger. It only seems as though it were in outward appearances. Inwardly it is love. It seems in outward appearances as though it were anger because the Lord appears to be angry when He admonishes a person, especially when the person is being punished by his evil, which love permits in order that his evil may be removed. The case is entirely like that of a parent. If he loves his children, he allows them to be chastised in order to remove their evils.

It is apparent from this why Jehovah declares Himself to be a jealous God (Deuteronomy 4:24; 5:9-10; 6:14-15).