Aristotle believed everything that existed had a purpose. For instance, a knife exists to cut things; an apple exists to be eaten; a cat exists to offer human companionship (or to kill mice).
I'm about to go to bed, and I've just wondered what Aristotle believed humans' purpose to be. If you know, feel free to comment here and I'll read them in the morning. Otherwise, maybe the book I'm reading will tell me. If not, I'll Google the question tomorrow.
This book makes me think.
Oh, by the way - what do you think the purpose of the human is?