This advancement, extended through each year, is a profit on the whole, and whatever is gained in infancy is an acquisition to youth. The same rule should be prescribed as to the following years, so that what every boy has to learn, he may not be too late in beginning to learn. Let us not then lose even the earliest period of life, and so much the less, as the elements of learning depend on the memory alone, which not only exists in children, but is at that time of life even most tenacious.