III. But there are more disorders of the mind than of the body, and they are of a more dangerous nature; for these very disorders are the more offensive because they belong to the mind and disturb it; and the mind, when disordered, is, as Ennius says, in a constant error: it can neither bear nor endure anything, and is under the perpetual influence of desires. Now, what disorders can be worse to the body than these two distempers of the mind (for I overlook others), weakness and desire? But how, indeed, can it be maintained that the mind cannot prescribe for itself, when she it is who has invented the medicines for the body, when, with regard to bodily cures, constitution and nature have a great share, nor do all who suffer themselves to be cured find that effect instantly; but those minds which are disposed to be cured, and submit to the precepts of the wise, may undoubtedly recover a healthy state? Philosophy is certainly the medicine of the soul, whose assistance we do not seek from abroad, as in bodily disorders, but we ourselves are bound to exert our utmost energy and power in order to effect our cure. But as to philosophy in general, I have, I think, in my Hortensius, sufficiently spoken of the credit and attention which it deserves: since that, indeed, I have been continually either disputing or writing on its most material branches; and I have laid down in these books all the discussions which took place between myself and my particular friends at my Tusculan villa. But as I have spoken in the two former of pain and death, this book shall be devoted to the account of the third day of our disputations.
We came down into the Academy when the day was already declining towards afternoon, and I asked one of those who were present to propose a subject for us to discourse on; and then the business was carried on in this manner:
IV. _A._ My opinion is, that a wise man is subject to grief.
_M._ What, and to the other perturbations of mind, as fears, lusts, anger? For these are pretty much like what the Greeks call [Greek: pathê]. I might call them diseases, and that would be a literal translation, but it is not agreeable to our way of speaking. For envy, delight, and pleasure are all called by the Greeks diseases, being affections of the mind not in subordination to reason; but we, I think, are right in calling the same motions of a disturbed soul perturbations, and in very seldom using the term diseases; though, perhaps, it appears otherwise to you.