The blind person is in a peculiar situation as regards visual stimuli and visual expressions in language. Now this is really strange, because they will constantly be exposed to words like “blue”, and even »emotional associations with these ‘unimaginable phenomenon’, such that they may know things like: blue is related to cold, ice, the sky, boys, water, and… melancholy. But having never seen or felt the seeing of blueness themselves, first-hand, or of any visual form or color, these expressions in language must seem incredibly bizarre. Yet, they usually emerge from and with seeing people, who speak of qualities and circumstances ordinarily familiar to those ‘whose physical eyes can see’.

There is a garden of fascinating instruction here. What do intelligent blind people make of all of this? Do they think that, while sighted, we are also mad? Nothing we say about color could make any sense. Even, what, mistakenly, appear to us as the simplest basis: blackness and whiteness… are concepts so alien as to seem either nonsensical or supernatural. They are supernatural to the blind, since they are supersensual to their accessible experience and no sighted person has yet learned to transmit anything alike with the spirit or experience of color ‘across this interval’ that distinguishes the blind from the seeing.

(Language evidence). TBC