DATES are a very useful invention. We could not do without them but unless we are very careful, they will play tricks with us. They are apt to make history too precise. For example, when I talk of the point-of-view of mediaeval man, I do not mean that on the 31st of December of the year 476, suddenly all the people of Europe said, "Ah, now the Roman Empire has come to an end and we are living in the Middle Ages. How interesting!" You could have found men at the Frankish court of Charlemagne who were Romans in their habits, in their manners, in their out-look upon life. On the other hand, when you grow up you will discover that some of the people in this world have never passed beyond the stage of the cave-man. All times and all ages overlap, and the ideas of succeeding generations play tag with each other. But it is possible to study the minds of a good many true representatives of the Middle Ages and then give you an idea of the average man's attitude toward life and the many difficult problems of living. First of all, remember that the people of the Middle Ages never thought of themselves as free-born citizens, who could come and go at will and shape their fate according to their ability or energy or luck. On the contrary, they all considered themselves part of the general scheme of things, which included emperors and serfs, popes and heretics, heroes and swashbucklers, rich men, poor men, beggar men and thieves. They accepted this divine ordinance and asked no questions. In this, of course, they differed radically from modern people who accept nothing and who are forever trying to improve their own financial and political situation. To the man and woman of the thirteenth century, the world hereafter--a Heaven of wonderful delights and a Hell of brimstone and suffering--meant something more than empty words or vague theological phrases. It was an actual fact and the mediaeval burghers and knights spent the greater part of their time preparing for it. We modern people regard a noble death after a well-spent life with the quiet calm of the ancient Greeks and Romans. After three score years of work and effort, we go to sleep with the feeling that all will be well.