The more we follow the divine design in the way we live, the more fully we are in God because of God’s omnipresence. Because God is omnipresent he is intrinsically present, so to speak, everywhere in his divine design, in the sense that he is the divine design, as we showed above [Sections 52–53]. Now, because we have been created as forms of the divine design, God is in us. But this is true only to the extent that we fully follow the divine design in the way we live. When we do not follow that design in the way we live, God is still in us, but is only in the highest parts of us, making it possible for us to understand what is true and intend what is good. That is, he gives us a capacity to understand and an inclination to love. The more we go against the divine design in the way we live, however, the more we bar the lower levels of our minds or spirits and prevent God from descending into them and filling them with his presence. As a result, God is in us but we are not in God.
There is a common saying in heaven: God is in all of us, the evil as well as the good, but we are not in God unless we follow the divine design in the way we live. The Lord says that he wants us to be in him and him to be in us (John 15:4).
When we follow the divine design in the way we live we are in God, because God is omnipresent in the universe and in everything within it at the inmost level, since things on the inmost level are in the divine design. Things that go against the divine design are all outside that inmost level. On the outer levels God’s omnipresence takes the form of an ongoing struggle with things that are against the divine design, and a constant effort to restore them to the divine design. The more we allow ourselves to be restored to the divine design, the more thoroughly present God is in each of us; consequently to a greater extent God is in us and we are in God.
It is no more possible for God to be absent from us than it is for the sun (through its heat and light) to be absent from our earth. The living things on earth, however, do not always feel the sun’s power. To feel it, they have to receive both the heat and the light that radiate from the sun, as they do in spring and summer. This situation is applicable to God’s omnipresence as well. The more we are in harmony with the divine design, the more spiritual heat and light, or to put it another way, the more of love’s goodness and wisdom’s true perspective we have.
Spiritual heat and light are not, however, like physical heat and light. During the winters, the amount of physical heat available to the world and the objects in it diminishes. During the nights, the amount of light diminishes. This happens because the earth makes units of time with its rotations and its orbit. Spiritual heat and light do not behave the same way. Through his sun and its heat and light God is always present and does not go through changes the way the sun of our solar system appears to do. We ourselves turn away from God much the way the earth turns away from the sun. When we turn away from wisdom’s true perspective we are like the earth turning away from the sun by night. When we turn away from the goodness of love we are like the earth turning away from the sun in winter. The useful effects of the sun in the physical world correspond in this way to the useful effects of the sun in the spiritual world.
from True Christianity, Section 70