Now I believe that there is metaphor in everything... a deeper understanding of life can be had by investigating it...
So...urination, respiration, defication, perspiration...
On one level, one may say that what we need we take into our bodies and
what we don't need passes through.
That this occurs whether it is what we eat, what we read, what we see, or what we learn.
We may learn in time to quit ingesting things by any source that causes turmoil to the system or is useless.
But isn't it in reality that everything we ingest eventually is used up, spent, converted and eliminated? So even if in the previous example we think that what leaves our system is stuff that is useless to us, stuff we don't need....in truth some of it was valuable, required and our system has simply decided it is time to move on and no longer has a need...
Does some pass through before it is entirely digested, understood, utilized?
One person's trash anothers treasure...does that not apply to thought as well as physical manifestations?
Gonna need boots if this thread gets any deeper.