Auldsoul,
Humans are more capable of doing some things more than other animals. So a human has more intellect than a dog. So a dog has more than a worm. So does the dog have a greater purpose because its smarter than a worm? Its all relative.
We are very capable of doing many things. But if we had to live in the manner a worm lives, we would fail miserably. We are no better than any other animal.
We are all dogs, we are all gods, we are all animals.
As Tet said, we all eat, sleep, shit, screw, etc.
If you think you are any better that makes you self-centered and egoistic.