[…] a far grosser error, that of actually identifying speech with thought and reason […] nothing but the most imperfect comprehension of language can account for a blunder so radical […].
- Whitney (1875), a pag.304

[…] man can traverse space, handle and shape materials, frame textures, penetrate distance, observe the minute, beyond what he could compass with his unequipped physical powers, by so much is the reach and grasp, the penetration and accuracy, of his thought increased by speech.
- Whitney (1875), a pag.23

[…] words, the instruments of thought […].
- Whitney (1875), a pag.23

Language […] signifies […] certain instrumentalities whereby men consciously and with intention represent their thought, to the end, chiefly, of making it known to other men: it is expression for the sake of communication.
- Whitney (1875), a pag.1