Ferdinand de Saussure

Any psychology of sign systems will be part of social psychology - that is to say, will be exclusively social; it will involve the same psychology as is applicable in the case of languages.

It is one of the aims of linguistics to define itself, to recognise what belongs within its domain. In those cases where it relies upon psychology, it will do so indirectly, remaining independent.

The critical principle demanded an examination, for instance, of the contribution of different periods, thus to some extent embarking on historical linguistics.

All true language is incomprehensible, like the chatter of a beggar's teeth.

We finally understand in general terms how a cell is organized, how its specialized organs function in a well integrated manner to insure its survival and replication.