Tacitus laughed at the Germanic tribes who tried to stop a torrent with their shields, but it is no less naive to believe in planetary migration or to believe in the establishment by purely human means of a society fully satisfied and perfectly inoffensive and continuing to progress indefinitely. All this proves that man ,though he has inevitably become less naive in some things, has nonetheless learned nothing as far as essentials are concerned; the only thing that man is capable of when left to himself is to "commit the oldest sins the newest kind of ways," as Shakespeare would say. And the world being what it is, one is doubtless not guilty of a truism in adding that it is better to go to Heaven naively than to go intelligently to hell.