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The faculty of memory is the cause and storehouse of remembrance and recollection. For memory is a fantasy s that is left behind of some sensation and thought manifesting itself in action; or the preservation of a sensation and thought . For the soul comprehends objects of sense through the organs of sense, that is to say, it perceives, and thence arises a notion: and similarly it comprehends the objects of thought through the mind, and thence arises a thought. It is then the preservation of the types of these notions and thoughts that is spoken of as memory.
Further, it is worthy of remark that the apprehension of matters of thought depends on learning, or natural process of thought, and not on sensation. For though objects of sense are retained in the memory by themselves, only such objects of thought are remembered as we have learned, and we have no memory of their essence.
Recollection is the name given to the recovery of some memory lost by forgetfulness. For forgetfulness is just loss of memory. The faculty of imagination then, having apprehended material objects through the senses, transmits this to the faculty of thought or reason (for they are both the same), and this after it has received and passed judgment on it, passes it on to the faculty of memory. Now the organ of memory is the posterior ventricle of the brain, which the Greeks call the paregkefalis, and the vital spirit it contains.
Concerning Conception and Articulation.
Again the reasoning part of the soul is divided into conception and articulation. Conception is an activity of the soul originating in the reason without resulting in utterance. Accordingly, often, even when we are silent we run through a whole speech in our minds, and hold discussions in our dreams. And it is this faculty chiefly which constitutes us all reasoning beings. For those who are dumb by birth or have lost their voice through some disease or injury, are just as much reasoning beings. But articulation by voice or in the different dialects requires energy: that is to say, the word is articulated by the tongue and mouth, and this is why it is named articulation. It is, indeed, the messenger of thought, and it is because of it that we are called speaking beings.