Such features as accent, cadence, and the treatment of consonants and vowels within the body of a word are often useful as aids in the external demarcation of the word, but they must by no means be interpreted [...] as themselves responsible for its psychological existence. They at best but strengthen a feeling of unity that is already present on other grounds.
- Sapir (1921), a pag.33

All the individual color of speech-personal emphasis, speed, personal cadence, personal pitch -is a non-linguistic fact, just as the incidental expression of desire and emotion are [...] alien to linguistic expression.
- Sapir (1921), a pag.46