"There is yet another class who do not depend on financial advantages, but support the winter in virtue of a brave and merry heart. One shivering evening, cold enough for frost, but with too high a wind, and a little past sundown, when the lamps were beginning to enlarge their circles in the growing dusk, a pair of barefooted lassies were seen coming eastward in the teeth of the wind. If the one was as much as nine, the other was certainly not more than seven. They were miserably clad; and the pavement was so cold, you would have thought no one could lay a naked foot on it unflinching. Yet they came along waltzing, if you please, while the elder sang a tune to give them music. The person who saw this, and whose heart was full of bitterness at the moment, pocketed a reproof which has been of use to him ever since, and which he now hands on, with his good wishes, to the reader."                  Robert Louis Stevenson.