CHAPTER XX
THE METHOD OF THE SCIENCES, SPECIFICALLY
1. We must now collect together the scattered observations that we have made on the proper teaching of the sciences, of the arts, of morality, and of piety. By proper teaching I mean teaching that combines ease, thoroughness, and rapidity.
2. Science, or the knowledge of nature, consists of an internal perception, and needs the same accessories as the external perception of the eye, namely, an object to observe, and light by which to observe it. If these be given, perception will follow. The eye of the inner perception is the mind or the understanding, the object is all that lies within or without our apprehension, while the light is the necessary attention. But, as in the case of external perception a definite procedure is necessary in order to apprehend things as they are, so with internal perception a certain method is necessary if things are to be presented to the mind in such a way that it can grasp them and assimilate them with ease.
3. The youth who wishes to penetrate the mysteries of the sciences must carefully observe four rules:
(iv)(i) He must keep the eye of his mind pure.
(iv)(ii) He must see that the object be brought near to it.
(iv)(iii) He must pay attention.
(iv) He must proceed from one object to another in
