supposed to be repeated an endless number of times on the different storeys of memory, and the same act of the mind may be performed at varying heights. In the effort of attention, the mind is always concerned in its entirety, but it simplifies or complicates itself according to the level on which it chooses to go to work. Usually it is the present perception which determines the direction of our mind; but, according to the degree of tension which our mind adopts and the height at which it takes its stand, the perception develops a greater or smaller number of images.
In other words, personal recollections, exactly localized, the series of which represents the courseSo there are different planes of memory; the largest includes all our past, and is the place of dream. of our past existence, make up, all together, the last and largest enclosure of our memory. Essentially fugitive, they become materialized only by chance, either when an accidentally precise determination of our bodily attitude attracts them, or when the very indetermination of that attitude leaves a clear field to the caprices of their manifestation. But this outermost envelope contracts and repeats itself in inner and concentric circles, which in their narrower range enclose the same recollections grown smaller, more and more removed from their personal and original form, and more and more capable, from their lack of distinguishing features, of being applied to the present perception and of determining it after the manner of a
