The greatest motivating force in the world is God's love. Love is the greatest drive in the human family. A man falls in love with a woman, a woman falls in love with a man, and some make such tremendous sacrifices for each other. When human love is genuine, it is a beautiful thing, it is a noble thing, it is a wonderful thing, and it is a tremendous drive. But God's love for His children far exceeds anything we can experience on the human plane.
Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not. (1 John 3:1)