Undoubtedly the remaining collections also contain many very ancient proverbs, but as a whole their literary form and thought is more complex. The descriptions of the kings suggest the Persian and Greek tyrants who ruled over the Jews during the long centuries after the exile (_cf._ xxv. 1-7, xxviii. 2, 12, 15, 28, xxix. 2, 4, 16, xix. 14), The age of the prophets has apparently been succeeded by that of the priest and the law (xxix. 18). Already the Jews have tasted the bitterness of exile (xxvii. 8). There are also certain points of close contact with proverbs of Ben Sira, written about 190 B.C. The sages as a class are very prominent, as in the later centuries before Christ. These and many other indications lead to the conclusion that the different collections were probably made after the exile, and that the noble introduction, i.-ix., and the two chapters in the appendix were not added until some time in the Greek period,--not long before 200 B.C. The date, however, when these proverbs arose and were committed to writing is comparatively unimportant, save as a knowledge of their background aids in their interpretation, and as they, in turn, reveal the life and thought of the persecuted, tempted Jews, whose religious life centred in the second temple. [Sidenote: _Teaching of the Song of Songs_] Probably in the Greek period also a poet-sage collected and wove together certain love and wedding songs of his race. The result was called the Song of Songs, that is, the Peerless Song. According to one interpretation, it presents, in a series of scenes, the heart struggle of a simple country maiden with the promptings of a true, pure love for a shepherd lover and the bewildering attractions of a royal marriage; and true love in the end triumphs. Whatever be the interpretation, it is clear that this exquisite little book, so filled with pictures of nature and simple country life, was intended to emphasize the duty and beauty of fidelity to nature and the promptings of the human heart. This thought is expressed in the powerful passage which seems to voice the central teaching of the poem: Love is strong as death; Jealousy is as cruel as Sheol; Its flashes are flashes of fire, A very flame of Jehovah. Many waters cannot quench love, Neither can floods drown it: If a man would give all the substance of his house for love, He would utterly be condemned. XI THE WRITINGS OF ISRAEL'S PHILOSOPHERS [Sidenote: _Discussions the problem of evil_]