§ i. I propose to discuss what is called and…

the unreasoning is adjusted and harmonized to reason, being adorned with obedience and wonderful mildness, that looking at it you would say with the poet, "At once the wind was laid, and a wondrous calm ensued, for the god allayed the fury of the waves,"¹⁰ reason having extinguished the vehement and furious and frantic motions of the desires, and making those which nature necessarily requires sympathetic and obedient and friendly and co-operative in carrying purposes out in action, so that they do not outrun or come short of reason, or behave disorderly and disobediently, but that every appetite is tractable, "as sucking foal runs by the side of its dam."¹¹ And this confirms the saying of Xenocrates about true philosophers, that they alone do willingly what all others do unwillingly at the compulsion of the law, as dogs are turned away from their pleasures by a blow, or cats by a noise, looking at nothing but their danger. It is clear then that there is in the soul a perception of such a generic and specific difference in relation to the desires, as of something fighting against and opposing them. But some say that there is no radical distinction difference or variance between reason and passion, but that there is a shifting of one and the same reason from one to the other, which escapes our notice owing to the sharpness and quickness of the change, so that we do not see at a glance that desire and repentance, anger and fear, giving way to what is disgraceful through passion, and recovery from the same, are the same natural property of the soul. For desire and fear and anger and the like they consider only depraved opinions and judgements, not in one portion of the soul only but in all its leading principles, inclinations and yieldings, and assents and impulses, and generally speaking in its energies soon changed, like the sallies of children, whose fury and excessive violence is unstable by reason of their weakness. But these views are, in the first place, contrary to evidence and observation; for no one observes in himself a change from passion to