AENESIDEMUS

This article appears in Volume V01, Page 258 of the Encyclopedia Britannica.

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AENESIDEMUS , Greek philosopher, was born at Cnossus in Crete and taught at Alexandria, probably during the first century B.C. He was the leader of what is sometimes known as the third sceptical school and revived to a

great

GREAT

extent the doctrine of Pyrrho and Timon. His

chief

CHIEF (from Fr. chef, head, Lat. caput)

work

WORK

was the Pyrrhonian Principles addressed to Lucius Tubero. His philosophy consisted of four main parts, the reasons for scepticism and doubt, the attack on causality and truth, a physical theory and a theory of morality. Of these the two former are important. The reasons for doubt are given in the form of the ten " tropes ": (I) different animals manifest different modes of perception; (2) similar differences are seen among individual men; (3) even for the same man, sense-given data are self-contradictory, (4) vary from time to time with physical changes, and (5) according to local relations; (6) and (7) objects are known only in-directly through the medium of air, moisture, &c., and are in a condition of perpetual

change

CHANGE (derived through the Fr. from the Late Lat. cambium, cambiare, to barter; the ultimate derivation is probably from the root which appears in the Gr. «a urmu', to bend)

in colour, temperature, size and motion; (8) all perceptions are relative and interact one upon another; (9) our impressions become less deep by repetition and custom; and (to) all men are brought up with different beliefs, under different

laws

LAWS

and social conditions. Truth varies infinitely under circumstances whose relative

weight

WEIGHT

cannot be accurately gauged. There is, therefore, no absolute knowledge, for every man has different perceptions, and, further, arranges and groups his data in methods peculiar to himself; so that the sum total is a quantity with a purely subjective validity. The second part of his

work

WORK

consists in the attack upon the theory of causality, in which he adduces almost entirely those considerations which are the basis of modern scepticism. Cause has no existence apart from,the mind which perceives; its validity is ideal, or, as Kant would have said, subjective. The relation between cause and effect is unthinkable. If the two things are different, they are either simultaneous or in succession. If simultaneous, cause is effect and effect cause. If not, since effect cannot precede cause, cause must precede effect, and there must be an instant when cause is not effective, that is, is not itself. By these and similar arguments he arrives at the fundamental principle of Scepticism, the radical and universal opposition of causes; 7ravri Abyq, Aoyos itpelKetras. Having reached
II
this conclusion, he was able to assimilate the physical theory of Heraclitus, as is explained in the Hypotyposes of Sextus Empiricus. For admitting that contraries co-exist for the perceiving subject, he was able to assert the co-existence of contrary qualities in the same object. Having thus disposed of the ideas of truth and causality, he proceeds to undermine the ethical criterion, and denies that any man can aim at Good, Pleasure or Happiness as an absolute, concrete ideal. All actions are product of pleasure and pain, good and evil. The end of ethical endeavour is the conclusion that all endeavour is vain and illogical. The main tendency of this destructive scepticism is essentially the same from its first crystallization by Aenesidemus down to the most advanced sceptics of to-day (see SCEPTICISM). For the immediate successors of Aenesidemus see

AGRIPPA

, SEXTUS EMPIRICUS. See also CARNEADES and ARCESILAUS. Of the IIvppWVecoc Abyoc nothing remains; we have, however, an

analysis

ANALYSIS (Gr. avci and Meta, to break up into parts)

in the Myriobiblion of Photius.
See Zeller's History of Greek Philosophy; E. Saisset, 'Enesideme, Pascal, Kant; Ritter and

Preller

FRIEDRICH
- FRIEDRICH, JOHANN (1836— )
_18041878_.html">PRELLER,
FRIEDRICH
- FRIEDRICH, JOHANN (1836— )
(1804–1878)
PRELLER, LUDWIG (1809–1861)

, 364-J70.

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