No is both the tool and the barrier by which we establish and maintain the distinct perimeter of the self. No says, "This is who I am; this is what I value; this is what I will and will not do; this is how I will choose to act." We love others, give to others, cooperate with others, and please others, but we are, always and at the core, distinct and separate selves. We need No to carve and support that space.