Originally posted by Jaxom
You say everything has a purpose, but perhaps it is your searching for everything to have a purpose that leads you to that conclusion? You have pointed out many things that seem to be placed for another's use, but likewise there are things that exist that seem to have no set place in the world, and yet they exist.
Your example here can be taken two ways...the fish was placed there to eat the weeds, or the fish developed preference for this weed, or tolerance for the weed if it tastes bad to others, simply because the weed was available when other food wasn't. Which is correct? Ockam's razor says the one that doesn't require extra entities is. So there is no placement of the fish there, it simply evolved the specialized diet.
But search on. Like I said in my first post to you, you have to find what's right for you, otherwise the belief is worthless.
I did not think that the fish was magically placed there to eat the weeds. The purpose of that fish is to eat the weeds, which is why weeds taste good to it. There is also other water plants it could be eating so it is not choosing the weeds just because there is nothing else. In fact, by eating the weeds it helps to maintain the health of the other plants. The purpose of the fish that it evolved from was not to eat the weeds but something else. When it is no longer needed to eat the weeds I evolved to suit the new purpose. Anyway, this fish is just an example that came to mind. It is not because this fish that I think human has a purpose.