"cellular memories" are stored within the body that are PAST-LIFE driven and it is through the "triggering" of these cellular memories that I believe our "karma" is "initiated"
(which, to me, is a drive or instinct "towards experiences" that will help "refine" our soul "growth" due to the actions we take -- and the attitudes and emotions associated with those actions and the "responses" those actions elicit)
so, in English -- your need for certain types of "experiences" may be pretty much hard-wired from jump
and that drive towards finding whatever within you NEEDS TO BE FOUND
is the primary vehicle through which "karma" and soul "growth" are facilitated
I haven't fully defined the how and why, of course
but, to me, these "past life" memories, if they are physically housed in the body, as I believe they are -- perhaps passed on as part of our DNA (how, for example, does it always seem as if people reincarnate looking much the same, with similar body types?)
have to be "housed" someplace and have to be "transported" some how
and if housed within our DNA's, as I suspect they are, they are potentially available to all of us to "remember", provided other memories and attitudes don't fully "drown out" these faint echoes from the past
if so, is this thing that reincarnates what we call "the soul"
and is the soul, then, really these memories and instincts hard-wired in to our body through the DNA strands ??
I think, more and more, that perhaps it is