[...] the word must denote, tag off, the image, must have no other significance than to serve as a counter to refer to it whenever it is necessary or convenient to do so.
- Sapir (1921), a pag.12

[...] the speech element 'house' is the symbol [...] not of a single perception [...] of a 'concept,' [...] of a convenient capsule of thought that embraces thousands of distinct experiences and that is ready to take in thousands more.
- Sapir (1921), a pag.13

[...] those who read and think without the slightest use of sound imagery are [...] dependent on it. They are merely handling the circulating medium [...] of visual symbols as a convenient substitute for the economic goods and services of the fundamental auditory symbols [...]
- Sapir (1921), a pag.20