But while he thus rejects incantations and is practically silent on the subject of natural magic, Seneca accepts natural divination in well-nigh all its branches: sacrificial, augury, astrology, and divination from thunder. He believes that whatever is caused is a sign of some future event.[482] Only Seneca holds that every flight of a bird is not caused by a direct act of God, nor the vitals of the victim altered under the axe by divine interference, but that all has been prearranged in a fatal and causal series.[483] He believes that all unusual celestial phenomena are to be looked upon as prodigies and portents. A meteor “as big as the moon appeared when Paulus was engaged in the war against Perseus”; similar portents marked the death of Augustus and execution of Sejanus, and gave warning of the death of Germanicus.[484] But no less truly do the planets in their unvarying courses signify the future. The stars are of divine nature, and we ought to approach the discussion of them with as reverent an air as when with lowered countenance we enter the temples for worship.[485] Not only do the stars influence the upper atmosphere as earth’s exhalations affect the lower, but they announce what is to occur.[486] Seneca employs the statement of Aristotle that comets signify the coming of storms and winds and foul weather to prove that they are stars; and declares that a comet is a portent of bad weather during the ensuing year in the same way that the Chaldeans or astrologers say that a man’s natal star determines the whole course of his life.[487] In fact, Seneca’s chief, if not sole, objection to the Chaldeans or astrologers would seem to be that in their predictions they take only five stars[488] into account. “What? Think you so many thousand stars shine on in vain? What else, indeed, is it which causes those skilled in nativities to err than that they assign us to a few stars, although all those that are above us have a share in the control of our fate? Perhaps those which are nearer direct their influence upon us more closely; perhaps those of more rapid motion look down on us and other animals from more varied aspects. But even those stars that are motionless, or because of their speed keep equal pace with the rest of the universe and seem not to move, are not without rule and dominion over us.”[489] Seneca accepts the theory of Berosus that whenever all the stars are in conjunction in the sign of Cancer there will be a universal conflagration, and a second deluge when they all unite in Capricorn.[490] [Sidenote: Divination from thunder.]