[...] the outward form only of language is constant; its inner meaning, its psychic value [...] varies freely with attention or the selective interest of the mind [...]
- Sapir (1921), a pag.14

All of the actual content of speech [...] is in origin limited to the concrete; relations were originally not expressed in outward form but were merely implied and articulated with the help of order and rhythm.
- Sapir (1921), a pag.114

Chinese [...] has no formal elements pure and simple, no 'outer form,' but it evidences a keen sense of relations, of the difference between subject and object, attribute and predicate [...] it has an 'inner form' in the same sense in which Latin possesses it, though it is outwardly 'formless' where Latin is outwardly 'formal'.
- Sapir (1921), a pag.124

[...] there are supposed to be languages which have no true grasp of the fundamental relations but content themselves with the [...] expression of material ideas, sometimes with an exuberant display of 'outer form,' leaving the pure relations to be merely inferred from the context.
- Sapir (1921), a pag.125

The only distinctively objective forms which we still possess in English are me, him, her [...] us, them, and whom. In all other cases the objective has come to be identical with the subjective -that is, in outer form, for we are not now taking account of position in the sentence.
- Sapir (1921), a pag.158