What it Means To Be Human

What it means to be human. What makes us people?
We could see it as a physical idea. We have legs, arms, feet, hands, fingers, fingernails, eyes, a nose, a chest, a heart, blood, veins. There is a general shape that makes us look like people. Our eyes see, our ears hear and our heart beats. But the monster, did he not have these things as well? This creation was able to feel pain, not only physically but emotionally as well. He had an instinctive need for love and affection, a hunger for knowledge, and a certain raw anger that festered inside of him as a result of lacking the things he needed.
The only thing that the monster did not have in common with others is that he was not born from a woman and not created by egg or seed. Is this what we think then? Since the only lacking piece to the puzzle of his human being was that he was not from an existing human body?
I will not say love is what it is to be human. I will not even say it is communication that separates the animals from the people.
It is not only the ability to feel that makes us what we are, but what we don't feel and acknowledge we are lacking. He did not feel love and although setback he pursued it. He felt anger and he killed. As humans we search for knowledge, closure, feelings.... did this "monster" not do just that?