Because I believe -WE ARE NOT HUMAN BEINGS HAVING A SPIRITUAL EXPERIENCE... WE ARE SPIRITUAL BEINGS , HAVING A HUMAN EXPERIENCE.
I believe that the human body is just a cocoon for our true being, the soul. I believe that everything we experience during our human existence is 'seasoning' (flavoring) our souls. The time spent in the human form is necessary to allow the 'seasoning' (strengthening) of our new and weak souls, once our soul is strong enough the cocoon is shed and the soul moves on to whatever is next. I believe that God decided to use the human body and human lifecycle to 'season' (strengthen and flavor) newly created/born souls (us).
Mikel: Thanks. You take a religious posture. I am not involved with religion but I respect your honest response. All we can do, you and I, is to agree to disagree..:-) Lets see what others think. Happy New Year..."may you live long and prosper." :-)
To fulfill a purpose. From a sheerly biological standpoint, that purpose is reproduction. Beyond that, it is difficult to say. Our minds long for knowledge of how things work and why - perhaps the "goal" there is knowledge of truth in as pure a form as possible.