Judging from the position of man among the other creatures of the sublunar world, we come to the conclusion, he tells us, that that which distinguishes him above his surroundings, namely, his rational soul, is the aim of all the rest; and they are means and preparations for it. The rational soul has two forms of activity. It may face upward and receive wisdom from the angels (theoretical knowledge). Or it may direct its attention downwards and judge the other corporeal powers (practical reason). But it must not devote itself unduly or without system to any one occupation. The aim of man is wisdom, science. Of the sciences the highest and the aim of all the rest is the knowledge of God. The body of man is his animal, which leads him to God. Some spend all their time in feeding the animal, some in clothing it, and some in curing it of its ills. The latter is not a bad occupation, as it saves the body from disease and death, and so helps it to attain the higher life. But to think of the study of medicine as the aim of life and devote all one's time to it is doing injury to one's soul. Some spend their time in matters even less significant than this, _viz._, in studying grammar and language; others again in mathematics and in solving curious problems which are never likely to happen. The only valuable part here is that which has relation to astronomy. Some are exclusively occupied in "twisting threads." This is an expression used by an Arabian philosopher,[230] who compares man's condition in the world to that of a slave who was promised freedom and royalty besides if he made the pilgrimage to Mecca and celebrated there. If he made the journey and was prevented from reaching the holy city, he would get freedom only; but if he did not undertake the trip he would get nothing. The three steps in the realization of the purpose are thus: making the preparations for the journey, getting on the road and passing from station to station, and finally wandering about in the place of destination. One small element in the preparation for the journey is twisting the threads for the water bottle. Medicine and law as means of gaining a livelihood and a reputation represent the stage of preparing for the journey. They are both intended to improve the ills of life, whether in the relations of man to man as in law; or in the treatment of the internal humors as in medicine. Medicine seems more important, for on the assumption of mankind being just, there would be no need of law, whereas the need for medicine would remain. To spend one's whole life in legal casuistry and the working out of hypothetical cases on the pretext of sharpening one's wits, is like being engaged in twisting threads continually--a little is necessary, but a great deal is a waste of time. It would be best if the religious man would first learn how to prove the existence of God, the meaning of prophecy, the nature of reward and punishment and the future