I wonder how all of these theories affect our behavior.
Hopefully, the idea that we are the purpose of creation should cause us to realize that as Jews our every single מחשבה דיבור ומעשה has infinite value and affects the entire cosmos. This is a tremendous privilege and responsibility, which is why we must try to put lots of thought into everything that we do: Is this really appropriate from someone who is the purpose of creation and the entire universe is being created for him to behave this way right now?