OF SENSATION.
VIDE Eneada-IV-6
24. (3) The soul contains the reasons of all things. The soul operates according to these reasons, whether incited to activity by some exterior object, or whether the soul be turned towards these reasons by folding back on herself. When the soul is incited to this activity by some exterior object, she applies her senses thereto; when she folds back on herself, she applies herself to thoughts. It might be objected that the result is that there is neither sensation nor thought without imagination; for just as in the animal part, no sensation occurs without an impression produced on the organs of sense; likewise there is no thought without imagination. Certainly, an analogy obtains between both cases. Just as the sense-image (type) results from the impression experienced by sensation, likewise the intellectual image (phantasm) results from thought.
OF MEMORY.
25. (2) Memory does not consist in preserving images. It is the faculty of reproducing the conceptions with which our soul has been occupied.