Among animals, some learn to speak and sing; they remember tunes, and strike the notes as exactly as a musician. Others, for instance the ape, show more intelligence... would it be absolutely impossible to teach the ape a language? I do not think so.

Let us not limit the resources of nature; they are infinite, especially when reinforced by great art.

What was man before the invention of words and the knowledge of language? An animal..

The soul is... but an empty word, of which no one has any idea, and which an enlightened man should use only to signify the part in us that thinks...