l.) as follows: “One angel does not perform two things, and two angels do not perform one thing”; this is exactly the property of all forces. We may find a confirmation of the opinion that the natural and psychical forces of an individual are called angels in a statement of our Sages which is frequently quoted, and occurs originally in Bereshit Rabba (chap. lxxviii.): “Every day God creates a legion of angels; they sing before Him, and disappear.” When, in opposition to this statement, other statements were quoted to the effect that angels are eternal—and, in fact, it has repeatedly been shown that they live permanently—the reply has been given that some angels live permanently, others perish; and this is really the case; for individual forces are transient, whilst the genera are permanent and imperishable. Again, we read (in Bereshit Rabba, chap. lxxxv.), in reference to the relation between Judah and Tamar: “R. Jochanan said that Judah was about to pass by [without noticing Tamar], but God caused the angel of lust, i.e., the libidinous disposition, to present himself to him.” Man’s disposition is here called an angel. Likewise we frequently meet with the phrase “the angel set over a certain thing.” In Midrash-Koheleth (on Eccles. x. 7) the following passage occurs: “When man sleeps, his soul speaks to the angel, the angel to the cherub.” The intelligent reader will find here a clear statement that man’s imaginative faculty is also called “angel,” and that “cherub” is used for man’s intellectual faculty. How beautiful must this appear to him who understands it; how absurd to the ignorant! We have already stated that the forms in which angels appear form part of the prophetic vision. Some prophets see angels in the form of man, e.g., “And behold three men stood by him” (Gen. xviii. 2); others perceive an angel as a fearful and terrible being, e.g., “And his countenance was as the countenance of an angel of God, very terrible” (Judges xiii. 6); others see them as fire, e.g., “And the angel of the Lord appeared to him in a flame of fire” (Exod. iii. 2). In Bereshit Rabba (chap. 1.) the following remark occurs: “To Abraham, whose prophetic power was great, the angels appeared in the form of men; to Lot, whose power was weak, they appeared as angels.” This is an important principle as regards Prophecy; it will be fully discussed when we treat of that subject (chap. xxxii. sqq.). Another passage in Bereshit Rabba (ibid.) runs thus: “Before the angels have accomplished their task they are called men, when they have accomplished it they are angels.” Consider how clearly they say that the term “angel” signifies nothing but a certain action, and that every appearance of an angel is part of a prophetic vision, depending on the capacity of the person that perceives it.