We are His people and the sheep of His pasture. In a good marriage, this sense of belonging extends to the whole family.
Parents speak of their children with love and pride.
The children speak affectionately of their mother, their father, their brother, their sister. This sense of belonging is available to all who acknowledge God as their Father. But many people don't recognize God as their Maker and Owner. They see themselves as orphans in a mindless universe, accidents of nature who have no purpose, meaning, or hope. I still love the words I memorized when I was a boy.