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The opinion which is said to be Zeno’s may deserve our consideration. He said that any one might give a guess at his proficiency from the observation of his dreams, if when asleep he fancied nothing that was immodest, nor seemed to consent to any wicked actions or dishonest intentions, but found his fancy and passions of his mind undisturbed, in a constant calm, as it were, always serene, and enlightened with the beams of divine reason. This very notion was hinted by PlatoRepublic, IX. p. 571 C. (as I interpret his words), where he is describing and delineating the soul which is tyrannical in its nature, and showing what manner of operations its fantasy and irrational appetite exert. When a man is asleep, he says, a vicious person designs the satisfying incestuous lust, has a longing for all sorts of meat indifferently, whether allowed or prohibited, and satisfies his appetite and desire in all manner of intemperance which is loose and unregarded, which, in the day-time, either the laws shame him out of, or fear to offend restrains.
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As now those brute beasts that are accustomed to labor will not, if the reins be let loose, either turn aside or offer to leave the track or stumble in it, so it is with the brutal faculty of the mind; when it is once made tame and manageable by the strength of reason, then it is unwilling carelessly to transgress or saucily to disobey its sovereign’s commands or to comply with any inordinate lusts, either in sleep or sickness; but it carefully observes and maintains its dictates to which it is accustomed, and by frequent exercise advances to perfect strength and intention of virtue.
