So, here is a question, something I have been thinking about lately, but for now I wont post any links because I am tired.

Basically every 7 years or so your body has been completely replaced by new cells. So then, how is it that we remain generally "the same" as people.

Some people would argue that this is where "souls" come in to play. In case you don't know, a soul is pretty much like a ghost. It is what "goes to heaven or hell" after we die if you are Christian and what is thought to be locked in an endless cycle of death and rebirth if you are Hindu. It is usually an eternal thing, your real presence in the universe.

So, what do you think? What keeps us the same? It is important to note that (unless I am mistaken) this question has yet to really be answered.

Personally I was raised Catholic, so the idea of souls will most likely always be somewhere in my head. However, for people in similar situations, one thing I learned recently is that Judaism, which is the precursor to Christianity, does not really teach that souls exist (or at least they didn't originally), so is that really something worth trusting?

Sorry for the shoddy nature of this post, but I'm tired and don't have any links on hand to further detail what I mean.