It seems a self-evident fact that during the two centuries which elapsed between the time of Aenesidemus and Sextus, the standpoint of judgment in the Sceptical School had greatly changed. An example illustrating this change we find in a comparison of the presentation of Scepticism by Diogenes with that of Sextus. The author Whom Diogenes follows, probably one of the Sceptical writers, considers Xenophanes, Zeno, and Democritus, Sceptics, and also Plato,[2] while Sextus, in regard to all of these men, opposes the idea that they were Sceptics.[3] Diogenes also calls Heraclitus a Sceptic, and even Homer,[4] and quotes sceptical sayings from the Seven Wise Men;[5] he includes in the list of Sceptics, Archilochus, Euripides, Empedocles, and Hippocrates,[6] and, furthermore, says that Theodosius, probably one of the younger Sceptics, objected to the name 'Pyrrhonean' on the ground that Pyrrho was not the first Sceptic.[7] [1] _Hyp._ I. 232. [2] Diog. IX. 11, 17-72. [3] _Hyp._ I. 213-214; I. 223-225. [4] Diog. IX. 11, 71. [5] Diog. IX. 11, 71. [6] Diog. IX. 11, 71-73. [7] Diog. IX. 11. 70. We have given the testimony from many sources to the effect that before the time of Sextus the Empirical School of Medicine was considered identical with Scepticism, although not so by Sextus himself. From all of these things we may infer a narrowing of the limits of Pyrrhonism in the time of Sextus. Let us accept with Brochard the development of thought seen in Aenesidemus from the beginning to the end of his career, without agreeing with him that Aenesidemus ever consciously changed his basis. He was a Sceptic in the Academy. He left the Academy on that account, and he remained a Sceptic to the end, in so far as a man can be a Sceptic, and take the positive stand that Aenesidemus did. Two things might account for his apparent dogmatism-- (i) The eclectic spirit of his time. (ii) The psychological effect upon himself of this careful systemisation of the Sceptical teachings.