[40] For all these attributes belong to speech, which is the brother of the intellect; for the intellect is the fountain of words, and speech is its mouth-piece, because all the conceptions which are entertained in the mind are poured forth by means of speech, like streams of water which flow out of the earth, and come into sight. And speech is an interpreter of the things which the mind has decided upon in its tribunal. Moreover, it is a prophet and a soothsayer of those things which the mind unceasingly pours forth as oracles from its inaccessible and invisible retreats.