The Teaching about a continuous Going up of Souls leaves those remaining behind to be overwhelmed by Evil.

But if a quantity of wine intoxicates and leads astray, [P. 102, l.18.] how (much more) will a quantity of Error intoxicate and lead astray! But if, as they say, the number of Souls constantly becomes less from day to day because they are 'refined and go up,' how are those Souls that are left behind able to conquer seeing that they are left [in the midst of a quantity of Evil which they are not able to conquer?] Why [do they not all join forces against the Evil?] Is it not clear to the blind, that when a king goes to fight a fierce battle with a numerous force . . . [he unites his force with] other forces. . . .? [Though] therefore kings wisely add . . . to their forces, in this battle which, as they say, is fiercer than these battles of ours, [P. 163, l.7.] see how the number of the Souls grows foolishly less!