"Watch a child standing at gaze at some sight new to him––a plough at work, for instance––and you will see he is as naturally occupied as is a babe at the breast; he is, in fact, taking in the intellectual food which the working faculty of his brain at this period requires. In his early years the child is all eyes; he observes, or, more truly, he perceives, calling sight, touch, taste, smell, and hearing to his aid, that he may learn all that is discoverable by him about every new thing that comes under his notice. Everybody knows how a baby fumbles over with soft little fingers, and carries to his mouth, and bangs that it may produce what sound there is in it, the spoon or doll which supercilious grown-up people give him to 'keep him quiet.' The child is at his lessons, and is learning all about it at a rate utterly surprising to the physiologist, who considers how much is implied in the act of 'seeing,' for instance: that to the infant, as to the blind adult restored to sight, there is at first no difference between a flat picture and a solid body,––that the ideas of form and solidity are not obtained by sight at all, but are the judgments of experience.
"Then, think of the vague passes in the air the little fist makes before it lays hold of the object of desire, and you see how he learns the whereabouts of things, having as yet no idea of direction. And why does he cry for the moon? Why does he crave equally, a horse or a house-fly as an appropriate plaything? Because far and near, large and small, are ideas he has yet to grasp. The child has truly a great deal to do before he is in a condition to 'believe his own eyes'; but Nature teaches so gently, so gradually, so persistently, that he is never overdone, but goes on gathering little stores of knowledge about whatever comes before him.
"And this is the process the child should continue for the first few years of his life. Now is the storing time which should be spent in laying up images of things familiar. By-and-by he will have to conceive of things he has never seen: how can he do it except by comparison with things he has seen and knows? By-and-by he will be called upon to reflect, understand, reason; what material will he have, unless he has a magazine of facts to go upon? The child who has been made to observe how high in the heavens the sun is at noon on a summer's day, how low at noon on a day in mid-winter, is able to conceive of the great heat of the tropics under a vertical sun, and to understand the climate of a place depends greatly upon the mean height the sun reaches above the horizon."