when they educate men, must educate them in every way, and suit them not only for the occupations of this life, but for eternity as well. Indeed it is with a view to the future life that all strenuous human effort should be undertaken.
12. Not the sciences alone, therefore, should be taught in schools, but morality and piety as well. Now a training in the sciences improves the understanding, the faculty of speech, and manual dexterity, so that everything that is of use can be suitably considered, discussed, and put into practice. If any one of these elements be omitted, a great gap is left, and, as result, not only is the education defective but the stability of the whole is endangered. Nothing can be stable unless all its parts are in intimate connection with one another.
Third Principle
13. Nature does not operate on anything, unless it possess a foundation or roots.
A plant does not shoot upwards before it has taken root, and would wither and die if it tried to do so. For this reason a clever gardener does not insert a graft unless he sees that the stock has taken root.
In the case of birds and of beasts we find, in the place of roots, the intestines (for in these the vitality is situated), and this part of the body is the first to be formed, being, as it were, the foundation of the rest.
14. Imitation.—In the same way an architect does not build a house without first laying a solid foundation, since otherwise the whole structure would soon fall down. Similarly an artist paints a foundation of colour before he puts in the fine shades; otherwise the colours would easily crack and fade.
15. Deviation.—The laying of such a foundation for their instruction is neglected by those teachers (1) who take no trouble to make their pupils diligent and attentive, and (2) who do not begin by giving a general idea of the whole course of study, so that the pupils may realise how
