A preacher I know has a daughter who keeps a daily notebook. On one page she had drawn a picture of her father and written carefully his name and address. When asked why, she explained. She had been watching a movie, Amnesia. She said, "If I ever forget who I am, I want everybody to know who I belong to."
We might like to improve the grammar, but we cannot improve the sentiment. In
fact, Christians need to remind themselves to whom they belong. Spiritual
amnesia is common enough in our experience.