Philonicus the Thessalian brought the horse Bucephalas to Philip, offering to sell him for thirteen talents; but when they went into the field to try him, they found him so very vicious and unmanageable, that he reared up when they endeavored to mount him, and would not so much as endure the voice of any of Philip's attendants. Upon which, as they were leading him away as wholly useless and untractable, Alexander, who stood by, said, "What a magnificent horse they lose, for want of address and boldness to manage him!" Philip at first took no notice of what he said, but when he heard him repeat the same thing several times, and perceived that he was much vexed to see the horse sent away, he said to him, "Do you reproach those who are older than yourself, as if you knew more, and were better able to manage him than they?" "I could manage this horse," replied he, "better than others do." "And if you fail," said Philip, "what will you forfeit for your rashness?" "I will pay," answered Alexander, "the whole price of the horse." At this the whole company fell to laughing;and as soon as the wager was settled amongst them, he immediately ran to the horse, and taking hold of the bridle, turned him directly towards the sun, having, it seems, observed that he was disturbed at and afraid of the motion of his own shadow; then letting him go forward a little, still keeping the reins in his hand, and stroking him gently when he found him beginning to grow eager and fiery, he let fall his upper garment softly, and with one nimble leap securely mounted him, and when he was seated, little by little drew in the bridle, and curbed him without either striking or spurring him. Presently, when he found him free from all rebelliousness, and only impatient for the course, he let him go at full speed, inciting him now with a commanding voice, and urging him also with his heel. Philip and his friends looked on at first in silence and anxiety for the result, till seeing him turn at the end of his career, and come back rejoicing and triumphing for what he had performed, they all burst out into acclamations of applause; and his father, shedding tears, it is said, for joy, kissed him as he came down from his horse, and in his transport, said, "O my son, seek out a kingdom worthy of thyself, for Macedonia is too little for thee."After this, considering him to be of a temper easy to be led to his duty by reason, but by no means to be compelled, he always endeavored to persuade rather than to command or force him to any thing; and now looking upon the instruction and tuition of his youth to be of greater difficulty and importance, than to be wholly trusted to the ordinary masters in music and poetry, and the common school subjects, and to require, as Sophocles says,The bridle and the rudder too,he sent for Aristotle, the most learned and most celebrated philosopher of his time, and rewarded him with a munificence proportionable to and becoming the care he took to instruct his son. For he repeopled his native city Stagira, which he had caused to be demolished a little before, and restored all the citizens who were in exile or slavery, to their habitations. As a place for the pursuit of their studies and exercises, he assigned the temple of the Nymphs, near Mieza, where, to this very day, they show you Aristotle's stone seats, and the shady walks which he was wont to frequent. It would appear that Alexander received from him not only his doctrines of Morals, and of Politics, but also something of those more abstruse and profound theories which these philosophers, by the very names they gave them, professed to reserve for oral communication to the initiated, and did not allow many to become acquainted with. For when he was in Asia, and heard Aristotle had published some treatises of that kind, he wrote to him, using very plain language to him in behalf of philosophy, the following letter: "Alexander to Aristotle greeting. You have not done well to publish your books of oral doctrine, for what is there now that we excel others in, if those things which we have been particularly instructed in be laid open to all? For my part, I assure you, I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion.
Farewell." And Aristotle, soothing this passion for pre-eminence, speaks, in his excuse for himself, of these doctrines, as in fact both published and not published. To tell the truth, his books on metaphysics are written in a style which makes them useless for ordinary teaching, and instructive only in the way of memoranda, for those who have been already conversant with that sort of learning.
Doubtless also it was to Aristotle, that he owed the inclination he had, not to the theory only, but also to the practice of the art of medicine. For when any of his friends were sick, he would often prescribe for them their course of diet, and medicines proper to their disease, as we may find in his epistles. He was naturally a great lover of all kinds of learning and reading; and Onesicritus informs us, that he constantly laid Homer's Iliads, according to the copy corrected by Aristotle, called "The casket copy," with his dagger under his pillow, declaring that he esteemed it a perfect portable treasure of all military virtue and knowledge. When he was in the upper Asia, being destitute of other books, he ordered Harpalus to send him some; who furnished him with Philistus's History, a great many of the plays of Euripides, Sophocles, and Aeschylus, and some dithyrambic odes, composed by Telestes and Philoxenus.