[...] in the highest degree [...] language is an instrument originally put to uses lower than the conceptual plane and [...] thought arises as a refined interpretation of its content.
- Sapir (1921), a pag.15

The word 'sing' cannot, as a matter of fact, be freely used to refer to its own conceptual content.
- Sapir (1921), a pag.27

[...] the feeling-tone change from one age to another (this, of course, is true of the conceptual content as well) [...]
- Sapir (1921), a pag.39

The inner sound-system [...] is a real and an immensely important principle in the life of a language. It may persist as a pattern, [...] long after its phonetic content is changed.
- Sapir (1921), a pag.56

[...] we feel that the analysis of farmer and duckling are practically irrelevant to an understanding of its content and entirely irrelevant to a feeling for the structure of the sentence as a whole.
- Sapir (1921), a pag.84

'Man' and 'white' possess an inherent relation to 'woman' and 'black,' but it is a relation of conceptual content only and is of no direct interest to grammar.
- Sapir (1921), a pag.101