What's me?

I can't see and I can't laugh
Without thy honour's permission;
All my body, and all my thoughts
And everything I own as stuff
Is under thine own discretion;
So what's me and what's mine
If thou ownest me-all
From foot to spine?
If the eyes don't work
And I can't talk;
If I can't be for me
Nor play I a role,
What's my purpose, where's me
What am I after all?