If the single significant elements of speech are the symbols of concepts, the actual flow of speech may be interpreted as a record of the setting of these concepts into mutual relations.
- Sapir (1921), a pag.13

From the point of view of language, thought may be defined as the highest latent or potential content of speech, the content that is obtained by interpreting each of the elements in the flow of language as possessed of its very fullest conceptual value.
- Sapir (1921), a pag.14

[...] murmuring and whisper [...] and still other types of voice are relatively unimportant in English and most other European languages, but there are languages in which they rise to some prominence in the normal flow of speech.
- Sapir (1921), a pag.48

[...] complex words [...] are in all likelihood nothing but sequences that have shrunk together and away from other sequences or isolated elements in the flow of speech.
- Sapir (1921), a pag.112

Neither common feeling nor the poet's choice need be at all conscious. It may be that not all are equally sensitive to the rhythmic flow of speech, but it is probable that rhythm is an unconscious linguistic determinant [...]
- Sapir (1921), a pag.161