And in this connection I find the Prince, God prolong his days, to have given to his intrinsically worthy character so much of the polish and lustre imparted by wisdom that he far outstrips his rivals among the princes, and overtops all such as are of his kind. And hence I clearly perceive that of all presents the one he will appreciate most is such as conduces to the most precious of the virtues, to wit wisdom. I had, however, so far profitted from a careful perusal of the books of the learnèd as to find their researches into the spiritual faculties among the most abstruse and refractory against the mind’s grasping what they mean, and the most bewildering, obscure and misleading as to their results. And yet I have seen it reported about a number of wise men (philosophers) and pious[4] saints that they agree in this dictum (motto), viz: “Whoso Knoweth himself, Knoweth his Lord”; and I have also heard the Chief of the Philosophers say, in agreement with their saying: “Whoso faileth to Know himself, is still more likely (apt) to fail of Knowing his Creator”; and “How shall he, who is trusted as a reliable authority in a science, be deemed to have any views at all, when he is ignorant of himself?” I see further the Book of the Most High GOD pointing to the measure of truth of this, where He says, when mentioning the distance separating the Erring from His mercy: Surah 59, al-Hashr, v. 19: “they forgot God, and He made them forget themselves”; is not His making the forgetting of self to depend upon forgetting Him done so as to awaken the attention to His closely binding the remembrance of Him with the remembrance of self, and the knowledge of Him with the knowledge of self, scilicet of one’s own soul? Furthermore, I have read in the books of the ancients that the hard task of going deeply into the knowledge of self had been enjoined upon them by an oracle that had descended upon them at one of the temples of the gods, which says: “Know thyself, O man, so shalt thou know thy Lord.” I have also read that this saying was engraved in the façade of the temple of Aesculapius, who is known among them as one of the prophets, and whose most famous miracle is that he was wont to heal the sick by mere loud supplication; and so did all priests who performed sacerdotal functions in his temple. From him have philosophers got the science of medicine.