From this description of the motives which had impelled him to publish the results of his thought and experience, and of the spirit in which he had composed his work, Coheleth passes, in ver. 11, to a description of the twofold function of the Teacher which is really a marvellous little poem in itself, a pastoral cut on a gem. That function is, on the one hand, _progressive_, and, on the other hand, _conservative_. At times the Teacher's words are like "goads" with which the herdsmen prick on their cattle to new pastures, correcting them when they loiter or stray; at other times they are like the "spikes" which the shepherds drive into the ground when they pitch their tents on pastures where they intend to linger: "The words of _the Wise_ are like goads," he says; and "the Wise" was a technical term for the sages who interpreted and administered the law; while "those of _the Masters of the Assemblies_ are like spikes driven home," "Masters of Assemblies" being a technical name for the heads of the colleges and schools which, during the Rabbinical period, were to be found in every town, and almost in every hamlet, of Judea. The same man might, and commonly did, wear both titles; and, probably, Coheleth was himself both a Wise Man and a Master. So much as this, indeed, seems implied in the very name by which he introduces himself in the Prologue. For Coheleth means, as we have seen, "one who calls an assembly together and addresses them," _i.e._ precisely such a wise man as was reckoned the "master of an assembly" among the Jews.
What did these Masters teach? Everything almost--at least everything then known. It is true that their main function was to interpret and enforce the law of Moses; but this function demanded all science for its adequate fulfilment. Take a simple illustration. The Law said, "Thou shalt not kill." Here, if ever, is a plain and simple statute, with no ambiguities, no qualifications, capable neither of misconstruction nor evasion. Anybody may remember it, and know what it means. _May_ they? I am not so sure of that. The Law says I am not to kill. What, not in self-defence! not to save honour from outrage! not in a patriotic war! not to save my homestead from the freebooter or my house from the midnight thief! not when my kinsman is slain before my eyes and in my defence! Many similar cases might be mooted, and were mooted, by the Jews. The Master had to consider such cases as these, to study the recorded and traditional verdicts of previous judges, the glosses and comments of other Masters; he had to lay down rules and to apply rules to particular and exceptional cases, just as our English Judges have to define the Common Law or to interpret a Parliamentary Statute. The growing wants of the Commonwealth, the increasing complexity of the relations of life as the people of Israel came into contact with foreign races, or were carried into captivity in strange lands, necessitated new laws, new rules of conduct. And as there was no recognised authority to issue a decree, no Parliament to pass an Act, the wise Masters, learned in the law of God, were compelled to lay down these rules, to extend and qualify the ancient statutes till they covered modern cases and wants. Thus in this very Book, Coheleth gives the rules which should govern a wise and pious Jew in the new relations of Traffic (ch. iv., vv. 4-16), and in the service of foreign despots (ch. x., vv. 1-20). For such contingencies as these the Law made no provision; and hence the rabbis, who sat in Moses' chair, made provision for them by legislating in the spirit of the Law.
Even in the application of known and definite laws there was need for care, and science, and thought. "The Mosaic code," says Deutsch, "has injunctions about the Sabbatical journey; the distance had to be measured and calculated, and mathematics were called into play. Seeds, plants, and animals had to be studied in connection with many precepts regarding them, and natural history had to be appealed to. Then there were the purely hygienic paragraphs, which necessitated for their precision a knowledge of all the medical science of the time. The seasons and the feast-days were regulated by the phases of the moon; and astronomy, if only in its elements, had to be studied." As the Hebrews came successively into contact with Babylonians, Persians, Greeks, Romans, the political and religious systems of these foreign races could not fail to leave some impressions on their minds, and that these impressions might not be erroneous and misleading, it became the Master to acquaint himself with the results of foreign thought. Nay, "not only was science, in its widest sense, required of him, but even an acquaintance with its fantastic shadows, such as astrology, magic, and the rest, in order that, both as lawgiver and judge, he might be able to enter into the popular feeling about these 'arts,'" and wisely control it.