From materials like these were formed the four elements, and the beautiful structure of the heavens and the earth; and into the active but irrational principle of matter, the divinity infused a rational soul. The souls of men were formed from the remainder of the rational soul of the world, which had previously given existence to the invisible gods and demons. The philosopher, therefore, supported the doctrine of ideal forms, and the pre-existence of the human mind, which he considered as emanations of the Deity, and which can never remain satisfied with objects or things unworthy of their divine original. Men could perceive, with their corporeal senses, the types of immutable things, and the fluctuating objects of the material world; but the sudden changes to which these are continually liable, create innumerable disorders, and hence arise deception, and, in short, all the errors of human life. Yet, in whatever situation man may be, he is still an object of divine concern, and, to recommend himself to the favor of the pre-existent cause, he must comply with the purposes of his creation, and, by proper care and diligence, he can recover those immaculate powers with which he was naturally endowed. All science the philosopher made to consist in reminiscence—in recalling the nature, forms, and proportions, of those perfect and immutable essences, with which the human mind had been conversant. From observations like these, the summit of felicity might be attained by removing from the material, and approaching nearer to the intellectual world; by curbing and governing the passions, which were ever agitated and inflamed by real or imaginary objects. The passions were divided into two classes: the first consisted of the irascible passions, which originated in pride or resentment, and were seated in the breast; the other, founded on the love of pleasure, was the concupiscible part of the soul, seated in the inferior parts of the body. These different orders induced the philosopher to compare the soul to a small republic, of which the reasoning and judging powers were stationed in the head, as in a firm citadel, and of which the senses were the guards and servants. By the irascible part of the soul, men asserted their dignity, repelled injuries, and scorned danger and the concupiscible part provided the support and the necessities of the body, and, when governed with propriety, gave rise to temperance. Justice was produced by the regular dominion of reason, and by the submission of the passions; and prudence arose from the strength, acuteness, and perfection of the soul, without which other virtues could not exist.