I was hoping you would weigh in on this, JT. Having a purpose does not mean you are "some incomplete-being" as you put it. If you believe in an intelligent creator, then you have to admit that God's ultimate purpose is to express or commincate himself/herself through the act of creation. We, being part of that creation and being created in His image, also seek to express ourselves through the act of using our life to create something in this physical dimension. (I'm not talking about a small tribal diety, either. I'm talking about the intelligent energy force that is behind all that is.)
Please correct me if I am misunderstanding you. I understand that man is body, mind, soul, and spirit. I understand that the ultimate goal is to be present in the here and now and that the presence of God within oneself knows God beyond oneself. I know that knowing who "you" are in reality is the key to this wisdom. But, we were created to exist in this physical world and through our five senses, our thoughts, and our feelings, God experiences His creation through us. So, you're right in that that is all we have to do.....just be present. However, some may be called to create something other....some may feel a higher purpose in order to express the God-within urge to create. Is it so far-fetched to think that each and every one of us is an expression of God's creativity and because of that, we should create something with our life if we feel a pull in that direction. And that, my friend, is also what already IS.....using your life to fulfill your purpose so God can experience your little input in the material plane of existence.