15. Nevertheless, the public calamities of cities have obviously their reason in justice. For a city has unity and continuity like a living creature, not devesting itself of identity by the changes that occur at successive periods of its life, nor becoming a different being from its former self by the lapse of time, but always retaining a conscious selfhood with the peculiarities that belong to it, and receiving the entire blame or praise of whatever it does or has done in its collective capacity, so long as the community which constitutes it and binds it together remains a unit. But dividing it by successive periods of time so as to make of a single city many cities, or rather an infinite number of cities, is like making of one man many men, because he is now elderly, yet once was younger, and still earlier was a mere stripling. This might remind one of the Epicharmians, from whom the sophists derived the cumulative argument,[43:1] according to which he who used to be in debt now owes nothing, having become a different man, and he who was yesterday invited to supper to-day comes uninvited, being another person. However, different periods of life make greater changes in every one of us than they ordinarily make in cities. One who sees Athens would recognize it thirty years afterward; for the present manners, sports, industries, likings, and resentments of the people closely resemble those of former days. But after a considerable time, scarce a kinsman or friend would recognize a man’s countenance and form; while the change of manners readily brought about in a person by differing fashions of intercourse, employment, experience, and legal obligation look strange and new even to one who has always known him. But yet the man is said to be one and the same man from the beginning to the end. The city in like manner remaining the same, we regard it as involved in the disgrace of its ancestry by the very right by which it shares their glory and their power. Else we shall throw everything into the river of Heracleitus, into which, he says, no one can enter twice, because changing nature is transposing and altering all things.