793. From here to the end of the chapter, the topic being discussed is the pre-Flood people who perished, as can be seen from the individual parts of the description. Anyone alive to the inner meaning can tell instantly what the subject is, even from a single word, and even more easily from the connections among many words. When the topic changes, different words suddenly come into use, or else the previous words are linked together in a new way. The reason for the shift is that spiritual themes have their own special vocabulary and heavenly themes have theirs, or to put it another way, intellectual matters have their own vocabulary and volitional ones theirs. Ruination, for example, is a word that applies to spiritual things, while devastation applies to heavenly things; a city has to do with spiritual things, while a mountain has to do with heavenly things; and so on. The same holds true for the ways that words link together.
No one could help being surprised to learn that in Hebrew it is often sound that distinguishes the two. In words that belong to the spiritual category, the first three vowels [of the Hebrew alphabet] usually predominate. In those that capture heavenly qualities, the last two vowels do. 1
The changing of topics here can be recognized by such signs, and also by the repetition involved (as discussed previously [§§435, 683, 707, 734, 765, 782]). To be specific, it says again here, "And the water strengthened greatly, greatly on the earth," as the last verse also said. The fact of a switch can also be recognized from everything that follows.
Footnotes:
1. In the Hebrew alphabet, the first three vowels correspond roughly to English a, e, and i; the last two, to o and u. In later comments on this subject, Swedenborg gradually moves the a vowel into the heavenly category. See Heaven and Hell 241; Sacred Scripture 90; and True Christianity 278. [LHC]