You cannot see God even in the spirit world. God is not visible

From Rev. Moon's Teaching Education Materials

Can you see energy? Since God is the original being of energy, He cannot be seen even in the spirit world. He has no a body. Hence, in order to guide and govern the physical world, He must assume a physical form. What kind of God is He? If, instead of falling, Adam had grown to maturity, flourished on earth, and gone to heaven, he would have become God, who retained the form of Adam. Hence, the invisible God and visible Adam would have become one. Then, Adam’s laughter would have been God’s laughter and the laughter of the universe. (105-193, 1979.10.21)

As an invisible deity, God cannot feel any stimulation from this universe. No matter how great a stimulus comes to His mind, as an incorporeal being, He will not feel inspiration. As these invisible aspects are the same, they cannot stimulate each other. When two conflicting things, like hot water and cold water, come together, there is a reaction, isn’t there. God needs that kind of stimulation. (141-37, 1986.2.16)

God is invisible even in the spirit world. He has no form. Thus in order to become the corporeal parent of humankind, God has to acquire a form. Without form He cannot become the center. (222-337, 1991.11.7)

God’s final purpose of creation is to acquire a body. Since the incorporeal God cannot govern the physical world, He must appear with a body as the Father and Mother of all humankind. He must assume a physical form in order to relate to created beings as subject partner and object partner, and thus feel stimulation through His sensory organs. (25-342, 1969.10.12)

As a being without form, God cannot rule over the physical world, although He created it. He therefore needs a body. God’s purpose of creation is to acquire a body and become a substantial parent. That was to be Adam and Eve. Had Adam and Eve reached perfection, God would have entered their minds and created a God-centered kingship. With the establishment of this kingship, the original Adam would have established the right of the parent, and along with that, the right of the eldest son. We would not have needed today’s realm of the second son. Adam himself would be the eldest of the elder sons; likewise, Eve would also be the eldest of the elder daughters. This way, the two children would have become the parents of all human parents, and at the same time monarchs of the eternal world. (214-39, 1991.2.1)