Such is the summary which we read of the doctrines of Hegesias: who is said to have enforced his views,[222]--of the real character of life, as containing a great preponderance of misfortune and suffering--in a manner so persuasive, that several persons were induced to commit suicide. Hence he was prohibited by the first Ptolemy from lecturing in such a strain. His opinions respecting life coincide in the main with those set forth by Sokrates in the Phædon of Plato: which dialogue also is alleged to have operated so powerfully on the Platonic disciple Kleombrotus, that he was induced to terminate his own existence. Hegesias, agreeing with Aristippus that pleasure would be the Good, if you could get it--maintains that the circumstances of life are such as to render pleasure unattainable: and therefore advises to renounce pleasure at once and systematically, in order that we may turn our attention to the only practicable end--that of lessening pain. Such deliberate renunciation of pleasure brings him into harmony with the doctrine of the Cynics. [Footnote 222: Compare the Pseudo-Platonic dialogue entitled Axiochus, pp. 366, 367, and the doctrine of Kleanthes in Sext. Empiric. adv. Mathemat. ix. 88-92. Lucretius, v. 196-234.] [Side-note: Doctrine of Relativity affirmed by the Kyrenaics, as well as by Protagoras.] On another point, however, Hegesias repeats just the same doctrine as Aristippus. Both deny any thing like absolute knowledge: they maintain that all our knowledge is phenomenal, or relative to our own impressions or affections: that we neither do know, nor can know, anything about any real or supposed ultra-phenomenal object, _i.e._, things in themselves, as distinguished from our own impressions and apart from our senses and other capacities. Having no writings of Aristippus left, we know this doctrine only as it is presented by others, and those too opponents. We cannot tell whether Aristippus or his supporters stated their own doctrine in such a way as to be open to the objections which we read as urged by opponents. But the doctrine itself is not, in my judgment, refuted by any of those objections. "Our affections ([Greek: pa/thê]) alone are known to us, but not the supposed objects or causes from which they proceed." The word rendered by _affections_ must here be taken in its most general and comprehensive sense--as including not merely sensations, but also remembrances, emotions, judgments, beliefs, doubts, volitions, conscious energies, &c. Whatever we know, we can know only as it appears to, or implicates itself somehow with, our own minds. All the knowledge which I possess, is an aggregate of propositions affirming facts, and the order or conjunction of facts, as they are, or have been, or may be, relative to myself. This doctrine of Aristippus is in substance the same as that which Protagoras announced in other words as--"Man is the measure of all things". I have already explained and