Besides (if memory be only storage of images), why then does one not remember a thing when it has been heard but once or twice? Why, when it has been heard often, is it long remembered, although it was not retained at first? This can surely not be because at first only some part of the images had been retained; for in that case those parts would be easily recalled. On the contrary, memory is produced suddenly as a result of the last hearing or reflexion. This clearly proves that, in the soul, we are only awaking the faculty of memory, only imparting to it new energy, either for all things in general, or for one in particular. Again, memory does not bring back to us only the things about which we have reflected; (by association of ideas) memory suggests to us besides a multitude of other memories through its habit of using certain indices any one of which suffices easily to recall all the remainder[233]; how could this fact be explained except by admitting that the faculty of memory had become strengthened? Once more, the preservation of images in the soul would indicate weakness rather than strength, for the reception of several impressions would imply an easy yielding to all forms. Since every impression is an experience, memory would be measured by passive receptivity; which, of course, is the very contrary of the state of affairs. Never did any exercise whatever render the exercising being more fitted to suffering (or, receptive experience). Still another argument: in sensations, it is not the weak and impotent organ which perceives by itself; it is not, for instance, the eye that sees, but the active potentiality of the soul. That is why old people have both sensations and memories that are weaker. Both sensation and memory, therefore, imply some energy. Last, as we have seen that sensation is not the impression of an image in the soul, memory could not be the storage-place of images it could not have received. MEMORY NEEDS TRAINING AND EDUCATION.