This self-surrender is called ätma-nivedana. According to different authorities, "self" is differently defined. "Self" is sometimes considered to refer to the spirit self, or soul, and "self" is sometimes considered to refer to the mind or to the body. Full self-surrender, therefore, means not only surrendering one's self as spirit soul, but also surrendering one's mind and body to the service of the Lord. Srila Bhaktivinode Thäkur has sung a nice song in this connection. While offering himself as a fully surrendered soul, he said, "My mind, my household affairs, my body, whatever is in my possession, my dear Lord, I offer to You for Your service. Now You can do with them as You like. You are the supreme possessor of everything, so if You like You can kill me, or if You like You can give me protection. All authority belongs to You. I have nothing to claim as my own."