Arcana Coelestia #143
143. That by “beasts” and “animals” were anciently signified affections and like things in man, may appear strange at the present day; but as the men of those times were in a celestial idea, and as such things are represented in the world of spirits by animals, and in fact by such animals as they are like, therefore when they spoke in that way they meant nothing else. Nor is anything else meant in the Word in those places where beasts are mentioned either generally or specifically. The whole prophetic Word is full of such things, and therefore one who does not know what each beast specifically signifies, cannot possibly understand what the Word contains in the internal sense. But, as before observed, beasts are of two kinds—evil or noxious beasts, and good or harmless ones—and by the good beasts are signified good affections, as for instance by sheep, lambs, and doves; and as it is the celestial, or the celestial spiritual man, who is treated of, such are here meant. That “beasts” in general signify affections, may be seen above, confirmed by some passages in the Word (n. 45, 46), so that there is no need of further confirmation.
Arcana Coelestia #45
45. Those who lived in the most ancient times thus signified the things relating to the understanding and to the will; and therefore in the Prophets, and constantly in the Word of the Old Testament, the like things are represented by different kinds of animals. Beasts are of two kinds; the evil, so called because they are hurtful; and the good, which are harmless. Evils in man are signified by evil beasts, as by bears, wolves, dogs; and the things which are good and gentle, by beasts of a like nature, as by heifers, sheep, and lambs. The “beasts” here referred to are good and gentle ones, and thus signify affections, because it here treats of those who are being regenerated. The lower things in man, which have more connection with the body, are called “wild animals of that earth” and are cupidities and pleasures.