WHILE we call the total assemblage of angels heaven because they do make it up, what really makes heaven overall and in every specific instance is the divine nature that emanates from the Lord, flowing into angels and accepted by them. The divine nature that emanates from the Lord is the good intrinsic to love and the truth intrinsic to faith. The amount angels accept from the Lord of what is good and what is true determines the extent to which they are angels and are heaven.
Everyone in the heavens knows, believes, and even perceives that nothing good is intended and done by the self and that nothing true is thought and believed by the self. Everything comes from the Divine, which means from the Lord. Anything good and true from the self is not good or true, because there is no life from the Divine within it. Angels of the central heaven perceive and feel the inflow distinctly. The more they accept, the more they seem to be in heaven, because they are more fully absorbed in love and faith, in the light of intelligence and wisdom, and in the heavenly joy that results. Once we see that all these qualities emanate from the Lord’s divine nature, we can see that the Lord’s divine nature makes heaven. It is not anything the angels do with a sense of ownership.
This is why in the Word heaven is called the Lord’s dwelling and his throne. It is why the people who live there are described as being “in the Lord.”b We will explain later how the divine emanates from the Lord and fills heaven.
from Heaven and Hell, Sections 7, 8