The other leaders of the Cyrenian school, _Hegesias_, _Theodorus_, _Anniceris_, we can here only name. The farther development of this school is wholly occupied in more closely defining the nature of pleasure, _i. e._ in determining whether it is to be apprehended as a momentary sensation, or as an enduring condition embracing the whole life; whether it belonged to the mind or the body, whether an isolated individual could possess it, or whether it is found alone in the social relations of life; whether we should regard it as positive or negative, (_i. e._ simply the absence of pain). 4. EUCLID AND THE MEGARIANS.—The union of the dialectical and the ethical is a common character in all the partial Socratic schools; the difference consists only in this, that in the one the ethical is made to do service to the dialectical, and that in the other, the dialectical stands in subjection to the ethical. The former is especially true of the Megarian school, whose essential peculiarity was pointed out by the ancients themselves as a combination of the Socratic and Eleatic principles. The idea of the good is on the ethical side the same as the idea of being on the physical; it was, therefore, only an application to ethics of the Eleatic view and method when Euclid called the good pure being, and the not-good, not-being. What is farther related of Euclid is obscure, and may here be omitted. The Megarian school was kept up under different leaders after his death, but without living force, and without the independent activity of an organic development. As hedonism (the philosophical doctrine of the Cyreneans that pleasure is the chief good) led the way to the doctrine of Epicurus, and cynicism was the bridge toward the Stoic, so the later Megaric development formed the transition point to scepticism. Directing its attention ever more exclusively towards the culture of the formal and logical method of argument, it left entirely out of view the moral thoughts of Socrates. Its sophistries and quiddities which were, for the most part, only plays of word and wit, were widely known and noted among the ancients.