Marcellus of Bordeaux, court physician of Theodosius I, and a writer upon medicine, throws some light upon the state of medicine in his day. He affirmed that pimples might be removed by wiping them the instant you saw a falling-star. He said that a tumor could be cured if one half of a root of vervain were tied about the sufferer’s neck and the other half suspended over a fire. His theory was that as the vervain dried up in the smoke of the fire, the tumor would by force of magic sympathy likewise dry up and disappear. Marcellus added for the benefit of unpaid physicians that so persistent would be the sympathetic bond established that if the root of the vervain were later thrown into water, its absorption of moisture would produce a return of the tumor.[[218]]
Ammianus Marcellinus, who wrote at the close of the fourth century, and who has been regarded by his critics from Gibbon down as a historian of distinguished merit, gives us an idea of mental conditions in his time, and was himself not free from belief in magic. It is true that in declaiming against the degeneracy of the Roman aristocracy he ridicules their trust in astrology, saying that many of them deny the existence of higher powers in heaven, yet think it imprudent to appear in public or dine or take a bath without first having consulted an almanac as to Mercury’s whereabouts or the exact position of the moon in Cancer.[[219]] Yet he believed in omens, portents and auspices, as the following citations will indicate and as one might show by other passages.
The first passage is one in which Ammianus speaks of Alexandria as formerly having been a great place of learning and as even in his degenerate days a considerable intellectual centre. According to him, it is a sufficient recommendation for any medical man if he say that he was educated at Alexandria.[[220]]
There whatever lies hidden is laid bare by geometry; music is not utterly forgotten nor harmony neglected; among some men, though their number may not be great, the motion of the world and stars is still a matter of consideration; there are not a few of those skilled in numbers.
This is not all. “Besides these things they cherish the science which reveals the decrees of fate.”[[221]]
The Emperor Julian was continually inspecting entrails of victims and interpreting dreams and omens, and even proposed to reopen a prophetic fountain which Hadrian was said to have blocked up for fear that others, like himself, might win the imperial throne through obedience to its predictions.[[222]] The mention of such practices of Julian leads Ammianus in another passage to attempt a justification of divination as a science worthy of the study and respect of the most erudite and intelligent. He says:
Inasmuch as to this ruler, who was a man of culture and an inquirer into all branches of learning, malicious persons have attributed the use of evil arts to learn the future, we shall briefly indicate how a wise man is able to acquire this by no means trivial variety of knowledge. The spirit behind all the elements, seeing that it is incessantly and everywhere active in the prophetic movement of everlasting bodies, bestows upon us the gift of divination by those methods which we acquire through divers studies; and the forces of nature, propitiated by various rites, as from exhaustless springs provide mankind with prophetic utterances.[[223]]
That is, we can foreknow, if not control, the results of the processes of universal nature. Since it is through the forces of nature that we do this, augury, oracular utterances, oneiromancy and astrology all become for Ammianus but subdivisions of physical science. He admits that there are persons who disagree with him, who object that predictions are often erroneous; but against such persons he employs the old refutation that occasional mistakes are to be attributed to man’s imperfect knowledge and faulty observation, and that by such mistakes the validity of divination is no more disproved than is grammar forever discredited because a grammarian speaks incorrectly, or music because a musician sings out of tune.[[224]] Opposition to the arts of divination he calls “vanities plebeia,” and upon such loud-mouthed ignorance of the vulgar he looks down with much the same superior smile that the lover of speculative philosophy to-day bestows upon the man in the street who irritably disputes the utility of that subject.
Indeed, the strength of Ammianus’s attachment to divination is so great that he quotes its arch-opponent, Cicero, in its support. For he concludes his discussion of the subject in these words: “Wherefore in this as in other matters Tully says most admirably, ‘Signs of future events are shown by the gods.’”[[225]] Unless perchance Ammianus was acquainted with the first book only of De Divinatione, this remark—which ought to have proved more potent than any necromantic spell in invoking Cicero’s slandered Manes—must be taken as a startling revelation of the mental calibre of both its maker and his age.
Synesius (370–430 A. D.), Bishop of Ptolemais, furnishes a good example of what was probably the position of the average Neo-Platonist who did not go to extremes in the last period of the Roman Empire. In the present survey we are not concerned with Christian belief in the Empire, and so it is only as a Neo-Platonist that Synesius will at present interest us. He is the more interesting for us in that he was a man with some taste for science. He knew some medicine and was well acquainted with geometry and astronomy, subjects which he probably studied under his friend Hypatia. He believed himself to be the inventor of an astrolabe and of a hydroscope. He played his part in secular politics and as bishop defended his people from oppression. He was fond of the chase and of his dogs and horses, and said so. He was a great lover of books also, but thought that their true use was to call one’s own mental powers into action. Philosophy, mathematics and literature all claimed his attention. Yet broad and independent-minded as he was for his age, and interested as he was in science, he believed in magic. Indeed, there was apparently no form of magic in which he would not have believed.