The relation between language and thought are discussed in Stuart Chase, Power of words (1954), especially Chapter 10; the important sourcebooks in t… - S. I. Hayakawa

Of all forms of symbolism, language is the most highly developed, most subtle, and most complicated. It has been pointed out that human beings, by agreement, can make anything stand for anything. Now, human beings have agreed, in the course of centuries of mutual dependency, to let the various noises that they can produce <span style="color:green" title="with their lungs, throats, tongues, teeth, and lips systematically">[...] stand for specified happenings in their nervous systems. We call that system of agreements language. For example, we who speak English have been so trained that, when our nervous systems register the presence of a certain kind of animal, we may make the following noise: "That's a cat." Anyone hearing us expects to find that, by looking in the same direction, he will experience a similar event in his nervous system -- one that will lead him to make an almost identical noise. Again, we have been so trained that when we are conscious of wanting food, we make the noise "I'm hungry." </SPAN>

A human being, then, is never dependent on his own experience alone for his information. Even in a primitive culture he can make use of the experience of his neighbors, friends, and relatives, which they communicate to him by means of language. Therefore, instead of remaining helpless because of the limitations of his own experience and knowledge, instead of having to discover what others have already discovered, instead of explporing the false traits they explored and repeating their errors, he can go on from where they left off. Language, that is to say, makes progress possible.

Whether he realizes it or not, however, Mr. Mets is affected every hour of his life not only by the words he hears and uses, but also by his unconscious assumptions about language. [...] Such unconscious assumptions determine the effect that words have on him -- which in turn determines the way he acts, whether wisely or foolishly. Words -- the way he uses them and the way he takes them when spoken by others -- largely shape his beliefs, his prejudices, his ideals, his aspirations. They constitute the moral and intellectual atmosphere in which he lives -- in short, his semantic environment.