B479 <=> B481 [BTG XXX Art, p. 480]
“As this said ‘currents-of-associative-movements’ does not proceed in the presences of the three-brained beings who have taken your fancy, as it generally proceeds in the presences of other three-brained beings, and as there were quite special reasons there for this, proper to them alone, I must therefore first of all explain it to you in rather more detail.
“The process is the same as that which also proceeds in us, but it proceeds in us when we are intentionally resting to allow the whole functioning of our common presence freely to transform, without hindrance by our will, all the varieties of being-energy required for our all-round active existence, whereas in them these said various being-energies can now arise only during their total inactivity, that is during what they call their ‘sleep,’ and then of course only ‘after-a-fashion.’
“Owing to the fact that they, like every other three-brained being of the whole of our Great Universe, have three separate independent spiritualized parts, each of which has, as a central place for the concentration of all its functioning, a localization of its own which they themselves call a ‘brain,’ all the impressions in their common presences whether coming from without or arising from within are also perceived independently by each of these ‘brains’ of theirs, in accordance with the nature of these impressions; and afterwards, as it is also proper to proceed in the presences of every kind of being without distinction of brain–system, these impressions together with previous impressions compose the total and thanks to occasional shocks evoke in each of these separate ‘brains’ an independent association.
“So, my boy, from the time when these favorites of yours completely ceased consciously to actualize in their common presences the ‘being-Partkdolg-duty,’ thanks only to the results of which what is called sane ‘comparative mentation’ as well as the possibility of conscious active manifestation can arise in beings from various associations, and from the time when their separate ‘brains,’ associating now quite independently, begin engendering in one and the same common presence three differently sourced being-impulses, they then, thanks to this, gradually, as it were, acquire in themselves three personalities, having nothing in common with each other, in respect of needs and interests.