Cast your eye round the room in which you sit, and select some three or four things that have been with man almost since his beginning; which at least we hear of early in the centuries and often among the tribes. Let me suppose that you see a knife on the table, a stick in the corner, or a fire on the hearth. About each of these you will notice one speciality; that not one of them is special. Each of these ancestral things is a universal thing; made to supply many different needs; and while tottering pedants nose about to find the cause and origin of some old custom, the truth is that it had fifty causes or a hundred origins. The knife is meant to cut wood, to cut cheese, to cut pencils, to cut throats; for a myriad ingenious or innocent human objects. The stick is meant partly to hold a man up, partly to knock a man down; partly to point with like a finger-post, partly to balance with like a balancing pole, partly to trifle with like a cigarette, partly to kill with like a club of a giant; it is a crutch and a cudgel; an elongated finger and an extra leg. The case is the same, of course, with the fire, about which the strangest modern views have arisen. A queer fancy seems to be current that a fire exists to warm people.