My example may be right for one child and wrong for the rest. If you enter into their way of looking at things you will know how to vary your instances as required; the choice depends on the study of the individual temperament, and this study in turn depends on the opportunities which occur to show this temperament. You will not suppose that, in the three or four years at our disposal, even the most gifted child can get an idea of all the arts and sciences, sufficient to enable him to study them for himself when he is older; but by bringing before him what he needs to know, we enable him to develop his own tastes, his own talents, to take the first step towards the object which appeals to his individuality and to show us the road we must open up to aid the work of nature. There is another advantage of these trains of limited but exact bits of knowledge; he learns by their connection and interdependence how to rank them in his own estimation and to be on his guard against those prejudices, common to most men, which draw them towards the gifts they themselves cultivate and away from those they have neglected. The man who clearly sees the whole, sees where each part should be; the man who sees one part clearly and knows it thoroughly may be a learned man, but the former is a wise man, and you remember it is wisdom rather than knowledge that we hope to acquire. However that may be, my method does not depend on my examples; it depends on the amount of a man's powers at different ages, and the choice of occupations adapted to those powers. I think it would be easy to find a method which appeared to give better results, but if it were less suited to the type, sex, and age of the scholar, I doubt whether the results would really be as good. At the beginning of this second period we took advantage of the fact that our strength was more than enough for our needs, to enable us to get outside ourselves. We have ranged the heavens and measured the earth; we have sought out the laws of nature; we have explored the whole of our island. Now let us return to ourselves, let us unconsciously approach our own dwelling. We are happy indeed if we do not find it already occupied by the dreaded foe, who is preparing to seize it.