Animal.

... of letting the humanity bleed out of me
until I was more animal than man.

Living in the moment,
eating when hungry,
sleeping when tired,
drinking when thirsty,
and running -- running just to run.

Simple desires,
simple answers to those desires.

Pain comes in easily managed forms.
The pain of hunger.
The pain of cold ice under your paws.
The pain of cutting claws when dinner got feisty.

Each pain had a simple answer,
a clear action to end that pain.

NOT LIKE BEING HUMAN....

Stephenie Meyer
Breaking Dawn
Book II, Chapter viii