We say nothing essential about the cathedral when we speak of its stones. We say nothing essential about Man when we seek to define him by the qualities of men. ↗
It's not the physical location of birth that defines citizenship, but whether your parents are citizens, and the express or implied consent to jurisdiction of the sovereign. ↗
Recognition of this kinship with the rest of the universe is necessary for understanding him, but his essential nature is defined by qualities found nowhere else, not by those he has in common with apes, fishes, trees, fire, or anything other than himself. ↗
A mustache really defines your face. My dad had a mustache when I was growing up, and I can still remember when he shaved it, he looked like a completely different person. ↗