A few months, however, develop a marked change--he begins to learn the use, and put forth the powers of his will. The body, developed in a commensurate degree, is able to obey that will. Thus commences locomotion. The child crawls or creeps about the floor; explores the little world--that is to say, the room where he resides, or the adjoining apartment--becomes familiar with its dimensions, bearings and contents, and recognizes his associates or fellow citizens of the same little world. Then he becomes familiar with the science of geography and of history, if I may so call it, in his little world. Prompted by curiosity, he may, perhaps, cast an occasional glance beyond the limits of his own abode. He may contemplate a building or landscape on the other side of the street or field, but with much of the same feeling as a man, more matured, casts his eyes to the distant planets. He concludes that these distant objects are entirely beyond the reach of his powers of locomotion. In a short time, however, his faculties, still expanding, develop new and increasing energies. He conceives "_big thoughts_." He even thinks of dispensing with his plodding, creeping manner of locomotion, and of trying to stand upright, and even make a first step towards walking. It is a great undertaking. He hesitates, doubts, fears, hopes, till finally, being cheered onward in his career by his parents or his nurse, he makes the attempt. After several falls, failures, and disappointments, he at length succeeds in walking two or three steps. O what a triumph in his powers of locomotion! He is cheered, embraced, overwhelmed, by those who have been watching his progress and encouraging him, until, overcome and carried away by an extasy of transport, he falls, blushing, smiling and exulting into the arms held out for his reception. He dreams not of a higher attainment. He is now, in his own estimation, at the very highest pinnacle of human development. Improving in his new mode of locomotion, he soon runs about the yard, along the street, through the field, makes new discoveries, sees new habitations, enlarges his geographical knowledge, and begins to conceive the probability that his views have been too narrow, and that there may be a bigger world, more people, and more buildings than were dreamed of in his philosophy. In a few years he may become familiar with the geography and history of the island or continent on which he lives. He may even begin to aspire after the knowledge of other climes, and to conceive or conjecture that beyond the limits of the almost infinite expanse of waters, things and beings may exist after the similitude of his own sphere. He longs to overcome the physical barriers, which confine him in so limited a sphere, and thus enlarge his acquaintance, his social feelings, his friendship, his affections and his scientific knowledge.