Ideas as they exist as a Metzius are limited and can only be expanded from outside themselves, For example: in the realm of ideas one can only expand a particular Metzius of sechel by 1) The limits (and vagaries) of the idea, 2) The limit of the Osiyos, 3) Stripping away the limit; Another example…

Discussion why only here in the lowest (physical) world is the Neshama a Mihalech [growing and in motion]. Lima’ala its Metzius is limited. [A discussion on the word Metzius]. Page 498 ff, NEW SV p. 657 ff.