I Am Here and Now

First and foremost I am here and now.
I am what I am and that is all that I am.
Then I am human, the animal.
Born with the will to live,
Living with the will to die.
Next, a son, a brother,
A part in the play, of the lives of others.
Finally, a friend, and enemy.
Endowed with the ability
To differentiate one from the other.