are distinguished by their object-matter, or their respective relations to it. I mean, whether the man of Imperfect Self-Control is such simply by virtue of having such and such object-matter; or not, but by virtue of his being related to it in such and such a way, or by virtue of both: next, whether Self-Control and Imperfect Self-Control are unlimited in their object-matter: because he who is designated without any addition a man of Imperfect Self-Control is not unlimited in his object-matter, but has exactly the same as the man who has lost all Self-Control: nor is he so designated because of his relation to this object-matter merely (for then his character would be identical with that just mentioned, loss of all Self-Control), but because of his relation to it being such and such. For the man who has lost all Self-Control is led on with deliberate moral choice, holding that it is his line to pursue pleasure as it rises: while the man of Imperfect Self-Control does not think that he ought to pursue it, but does pursue it all the same.

Now as to the notion that it is True Opinion and not Knowledge in contravention of which men fail in Self-Control, it makes no difference to the point in question, because some of those who hold Opinions have no doubt about them but suppose themselves to have accurate Knowledge; if then it is urged that men holding Opinions will be more likely than men who have Knowledge to act in contravention of their conceptions, as having but a moderate belief in them; we reply, Knowledge will not differ in this respect from Opinion: because some men believe their own Opinions no less firmly than others do their positive Knowledge: Heraclitus is a case in point.

Rather the following is the account of it: the term knowing has two senses; both the man who does not use his Knowledge, and he who does, are said to know: there will be a difference between a man's acting wrongly, who though possessed of Knowledge does not call it into operation, and his doing so who has it and actually exercises it: the latter