Wherever we can see clearly, we see that what we call mind and thought consist in this, that man has the power not only to receive presentations like an animal, but to discover something general in them. This element he can eliminate and fix by vocal signs; and he can further classify single presentations under the same general concepts, and mark them by the same vocal signs.

Silesian Horseherd.

Language and thought go hand in hand; where there is as yet no word, there is not yet an idea. The thinking capacity of the mind has its source in language, lives in language, and develops continually in language.

Silesian Horseherd.

All our thoughts, even the apparently most abstract, have their natural beginnings in what passes daily before our senses. Nihil in fide nisi quod ante fuerit in sensu. Man may for a time be unheedful of these voices of nature; but they come again and again, day after day, night after night, till at last they are heeded. And if once heeded, those voices disclose their purport more and more clearly, and what seemed at first a mere sunrise becomes in the end a visible revelation of the infinite, while the setting of the sun is transfigured into the first vision of immortality.

Hibbert Lectures.

As the evolution of nature can be studied with any hope of success in those products only which nature has left us, the evolution of mind also can be effectually studied in those products only which mind itself has left us. These mental products in their earliest form are always embodied in language, and it is in language, therefore, that we must study the problem of the origin, and of the successive stages in the growth of mind.

Science of Thought.

If language and reason are identical, or two names, or two aspects only of the same thing, and if we cannot doubt that language had an historical beginning, and represents the work of man carried on through many thousands of years, we cannot avoid the conclusion that before those thousands of years there was a time when the first stone of the great temple of language was laid, and before that time man was without language, and therefore without reason.

Science of Thought.