Name is the basic element of language. Plato＇ s Cratylus probes the problems of naming in the way of inquiring the origins and nature of name, eventually expounds the relationship of language and＂eidos＂. Firstly, Platonic Socrates, through dening that ＂Man is the criterion of everything＂, he denies that name is not made at random or by convention, then affirms that name should have its own permanent nature; moreover, he denies those notions, which thinks that ＂Everything flows, nothing permanently exists＂, etc. and that name has its own innate nature, the names which gods （the initial namegivers） offer are true; finally, he conclucles that name is made in naturally suitable way by lawmakers under the direction of dialecticians through using letters and syllables to imitate the ideal names, however, the naturally suitable way of naming can not deduce from names＇naturalism and coventionhsm. Secondly, language composed with name is not perfect, we will be deceived if we getting knowledge through name and language. Knowledge can not be obtained from the name and language based on the proposition ＂Man is the criterion of everything＂ or ＂Everything flows, nothing permanently exists＇and it could be only gotten from the learning and studying of things themselves; what is more, by seeking the absolute Good, Beauty, and Exsitenee, we can get the true knowledge, namely, the knowledge of the absolute exsistene, ＂edios＂, at the same time, ours souls can be calm rather than confused by the the rheologic phenomena of the world.
Journal of Qingyuan Polytechnic