In these days, the sling is only considered as a mere toy, whereas, before the introduction of fire-arms, it was one of the most formidable weapons that could be wielded by light troops. Round and smooth stones weighing three or four ounces were the usual projectiles, and, by dint of constant practice from childhood, the slingers could aim with a marvellous precision. Of this fact we have a notable instance in David, who knew that the sling and the five stones in the hand of an active youth unencumbered by armour, and wearing merely the shepherd's simple tunic, were more than a match for all the ponderous weapons of the gigantic Philistine. It has sometimes been the fashion to attribute the successful aim of David to a special miracle, whereas those who are acquainted with ancient weapons know well that no miracle was wrought, because none was needed; a good slinger at that time being as sure of his aim as a good rifleman of our days. The sling was in constant requisition, being used both in directing the Sheep and in repelling enemies: a stone skilfully thrown in front of a straying Sheep being a well-understood signal that the animal had better retrace its steps if it did not want to feel the next stone on its back. [Illustration: AN EASTERN SHEPHERD.] Passing his whole life with his flock, the shepherd was identified with his Sheep far more than is the case in this country. He knew all his Sheep by sight, he called them all by their names, and they all knew him and recognised his voice. He did not drive them, but he led them, walking in their front, and they following him. Sometimes he would play with them, pretending to run away while they pursued him, exactly as an infant-school teacher plays with the children. Consequently, they looked upon him as their protector as well as their feeder, and were sure to follow wherever he led them. [Illustration: SHEEP FOLLOWING THEIR SHEPHERD.] We must all remember how David, who had passed all his early years as a shepherd, speaks of God as the Shepherd of Israel, and the people as Sheep; never mentioning the Sheep as being driven, but always as being led. "Thou leddest Thy people like a flock, by the hands of Moses and Aaron" (Ps. lxxvii. 20); "The Lord is my Shepherd.... He leadeth me beside the still waters" (Ps. xxiii. 1, 2); "Lead me in a plain path, because of mine enemies" (Ps. xxvii. 11); together with many other passages too numerous to be quoted. Our Lord Himself makes a familiar use of the same image: "He calleth his own sheep by name, and leadeth them out And when he putteth forth his own sheep, he goeth before them, and the sheep follow him: for they know his voice."