645. And they have power over the waters to turn them into blood, signifies that truths with such are turned into falsities from evil. This is evident from the signification of "having power" when "the olive trees and lampstands" are referred to, as signifying the goods of love and the truths of doctrine; not that these themselves have such power, namely, to turn truths into falsities, since this is contrary to their nature, which is to turn falsities into truths, for good acts with them and not evil, and yet they appear to have this power and appear to do this, because this occurs when they are hurt; but it is the evil that is from hell, or hell from which all evil comes, that "turns waters into blood," that is, truths into falsities from evil. The above is evident also from the signification of "waters," as being truths (of which above, n. 71, 483, 518, 537, 538); also from the signification of "blood," as being the truth of the Word, and thence of doctrine from the Word, and in the contrary sense falsity, in particular the truth of the Word falsified, for "to shed blood" signifies to do violence to charity, and also to Divine truth which is in the Word. (But as to the signification of "blood" in both senses, see above, n. 329.)

In Genesis 9:13, this signifies the state of light in obscurity of the regenerate spiritual man. (Arcana Coelestia 1042)

In Exodus 13:21, this signifies a state of enlightenment tempered by obscurity in respect to truth. (Arcana Coelestia 81-86)

In Psalm 147:8, this signifies that the Lord defends and preserves the spiritual meanings of the Word by the natural truths in through the Bible's literal sense. (Apocalypse Explained 594[12])

In Isaiah 60:8, this signifies to search and investigate truth from the Word's literal sense. (Apocalypse Explained 282[5])

In Isaiah 19:1, the phrase 'Jehovah rides upon a light cloud, and comes into Egypt', signifies the visitation of the natural man from spiritual-natural Divine Truth, for a visitation is an examination into the quality of a man, and examination is made by means of Divine Truth. A light cloud denotes the spiritual-natural Divine Truth from which the quality of man as to his natural-self becomes evident.

(Odkazy: Apocalypse Explained 654)