[...] stress has frequently played a controlling influence in the formation of element-groups or complex words out of certain sequences in the sentence.
- Sapir (1921), a pag.112

[...] stress has done more than articulate or unify sequences that in their own right imply a syntactic relation. Stress is the most natural means at our disposal to emphasize a linguistic contrast, to indicate the major element in sequence.
- Sapir (1921), a pag.112

[...] accent [...] no less than sequence, may serve as the unaided symbol of certain relations [...] Such alterations of relation, as symbolized by varying stresses, are important and frequent in a number of languages.
- Sapir (1921), a pag.112