The student of physiology should be taught that the object of his study is not merely to gain a knowledge of facts and principles. This alone will prove of little benefit. He may understand the importance of ventilation; his room may be supplied with pure air; but unless he fills his lungs properly, he will suffer the results of imperfect respiration. So the necessity of cleanliness may be understood, and needful facilities may be supplied; but all will be without avail unless put to use. The great requisite in teaching these principles is to impress the pupil with their importance, so that he will conscientiously put them in practise. [Sidenote: _The Body God’s Dwelling-place_] By a most beautiful and impressive figure, God’s word shows the regard He places upon our physical organism, and the responsibility resting on us to preserve it in the best condition: “Know ye not that your body is a temple of the Holy Spirit which is in you, which ye have from God? and ye are not your own.” “If any man defile the temple of God, him shall God destroy; for the temple of God is holy, which temple ye are.”[324] Let pupils be impressed with the thought that the body is a temple in which God desires to dwell; that it must be kept pure, the abiding-place of high and noble thoughts. As in the study of physiology they see that they are indeed “fearfully and wonderfully made,”[325] they will be inspired with reverence. Instead of marring God’s handiwork, they will have an ambition to make all that is possible of themselves, in order to fulfil the Creator’s glorious plan. Thus they will come to regard obedience to the laws of health, not as a matter of sacrifice or self-denial, but as it really is, an inestimable privilege and blessing. _Temperance and Dietetics_ “EVERY MAN THAT STRIVETH FOR THE MASTERY IS TEMPERATE IN ALL THINGS” [Sidenote: _Plain Living; High Thinking_] Every student needs to understand the relation between plain living and high thinking. It rests with us individually to decide whether our lives shall be controlled by the mind or by the body. The youth must, each for himself, make the choice that shapes his life; and no pains should be spared that he may understand the forces with which he has to deal, and the influences which mould character and destiny. [Sidenote: _Prevention of Intemperance_]