Let us for this purpose suppose that a lighted candle is suddenly presented before a young infant. He looks at it; he thinks of it; his mind is employed with the flame of the candle in a manner quite different from what it is upon any thing else in the room. All the other images which enter the eye fail to make an impression upon the mind; but this object which the child looks at,--observes,--does this; and accordingly, while it is passive as to every thing else, the mind is found to be actively engaged with the candle. He not only sees it, but he looks at it. This, and similar "reiterations" of ideas by the mind, frequently repeated by the infant, gradually communicate to it a consciousness of mental power, and enable him more and more easily to wield it. Every such instance of the reiteration of an idea,--of the voluntarily exercise of active thought,--strengthens the powers of the mind, so that he is soon able to look at and follow with his eyes other objects, although they are much less conspicuous than the glare of a candle. When we examine the matter a little farther in regard to infants, we perceive, that all the little arts used by the mother or the nurse, to "amuse the child," as it is called, are nothing more than means employed to excite this reiteration of ideas by the mind. A toy, for example, is presented to the infant, and his attention is fixed upon it. He is not satisfied with passively seeing the toy, as he sees all the other objects in the room, but he actively looks at it. Nor is this enough; the toy is usually seized, handled, mouthed, and turned; and each movement prompts the mind to active thought,--to reiterate the idea which each of the sensations suggests. These impressions are no doubt rapid, but they are real; and each of them has been reiterated,--actively thought of,--before they could either be received, or remembered; and it is only by these impressions frequently repeated, in which the mind is vigorously and delightfully engaged, that it acquires that activity and strength which we so frequently witness in the young.