Linguistic experience, both as expressed in standardized, written form and as tested in daily usage, indicates [...] that there is not, as a rule, the slightest difficulty in bringing the word to consciousness as a psychological reality.
- Sapir (1921), a pag.33

Subject and 'predicate' may be combined in a single word, as in Latin 'dico'; each may be expressed independently, as in the English equivalent, 'I say' [...]
- Sapir (1921), a pag.35

[...] the idea of 'hide' may be also expressed by the word 'conceal,' the notion of 'three times' also by 'thrice.' The multiple expression of a single concept is universally felt as a source of linguistic strength and variety, not as a needless extravagance.
- Sapir (1921), a pag.37

[...] every language has an inner phonetic system of definite pattern. [...] it has also a definite feeling for patterning on the level of grammatical formation. Both of these [...] impulses to definite form operate as such, regardless of the need for expressing particular concepts [...]
- Sapir (1921), a pag.61

However [...] in its ultimate origins the process of composition may go back to typical sequences of words in the sentence, it is now, for the most part, a specialized method of expressing relations.
- Sapir (1921), a pag.65

In probably the majority of languages that use both types of affixes each group has both delimiting and formal or relational functions. The most that we can say is that a language tends to express similar functions in either the one or the other manner.
- Sapir (1921), a pag.69