Nor did the Romans hit upon the idea of progress in any form remotely approaching our modern meaning. The casual reader, to be sure, will find occasional flares of expectancy about the future or of pride in the advance of the past which at first suggest progressive interpretations of history. So Seneca, rejoicing because he thought he knew the explanation of the moon's eclipses, wrote: "The days will come when those things which now lie hidden time and human diligence will bring to light. . . . The days will come when our posterity will marvel that we were ignorant of truths so obvious." [2] So, too, the Epicureans, like the Greek tragedians before them, believed that human knowledge and effort had lifted mankind out of primitive barbarism and Lucretius described how man by the development of agriculture and navigation, the building of cities and the establishment of laws, the manufacture of physical conveniences and the creation of artistic beauty, had risen, "gradually progressing," to his present height.[3] Such hopeful changes in the past, however, were not the prophecies of continuous advance; they were but incidental fluctuations in a historic process which knew no progress as a whole. Even the Stoics saw in history only a recurrent rise and fall in endless repetition so that all apparent change for good or evil was but the influx or the ebbing of the tide in an essentially unchanging sea. The words of Marcus Aurelius are typical: "The periodic movements of the universe are the same, up and down from age to age"; "He who has seen present things has seen all, both everything which has taken place from all eternity and everything which will be for time without end; for all are of one kin and of one form"; "He who is forty years old, if he has any understanding at all, has, by virtue of the uniformity that prevails, seen all things which have been and all that will be." [4] When with these Greek and Roman ideas the Hebrew-Christian influences blended, no conception of progress in the modern sense was added by the Church's contribution. To be sure, the Christians' uncompromising faith in personality as the object of divine redemption and their vigorous hope about the future of God's people in the next world, if not in this, calcined some elements in the classical tradition. Belief in cycles, endlessly repeating themselves through cosmic ages, went by the board. This earth became the theatre of a unique experiment made once for all; in place of the ebb and flow of tides in a changeless sea, mankind's story became a drama moving toward a climactic denouement that would shake heaven and earth together in a divine cataclysm. But this consummation of all history was not a goal progressively to be achieved; it was a divine invasion of the world expectantly to be awaited, when the victorious Christ would return and the Day of Judgment dawn.