By examining and scrutinizing the three essentials of divine love, one can come to see that they were the reason for creation. The first essential, loving others outside of himself, was a reason for creation in that the universe is outside God (just as the world is outside the sun). The universe is something to which God could extend his love and in which he could put his love into action and so find rest. We read that after God had created heaven and earth he rested; and that he made the Sabbath day for that reason (Genesis 2:2–3).
You can see that the second essential, God’s wanting to be one with others, was also a reason for creation from the fact that people were created in the image and likeness of God. The “image” and the “likeness” mean that we were made as forms that are receptive to love and wisdom from God—forms that God could be one with, and on whose account he could be one with all the other things in the universe, which are all nothing but means. A connection with the final cause is also a connection with the intermediate causes. Genesis, the Book of Creation, makes it clear that all things were created for the sake of humankind (Genesis 1:28–30).
That the third essential, God’s blessing others from himself, is a reason for creation you can see from the fact that the angelic heaven was provided for everyone who has let God’s love in, a place where the blessings of all come from God alone.
The three essentials of God’s love are the reason the universe is maintained as well, because maintaining is an ongoing creation, just as continuing to exist is the same as perpetually coming into being. Divine love is the same from eternity to eternity. The nature God’s love has now and will have in the future is the same nature it had when creating the world.
If you understand all this in the right way, you will be able to see the universe as a coherent work from beginning to end, a work holding purposes, means, and results in indissoluble connection.
Every love has a purpose. All wisdom moves toward fulfilling that purpose by intermediate means, using those means to achieve effective, useful results. Therefore it follows that the universe is a work that embodies divine love, divine wisdom, and usefulness of all kinds. In every conceivable way, then, it is a coherent work from beginning to end. The fact that the universe consists of constant useful functions produced by wisdom under love’s initiative is something all wise people can contemplate as if they were seeing it in a mirror. Once they acquire a general picture of how the universe was created, they can focus on the details. This is because parts adapt to the whole, and the whole places the parts in a harmonious arrangement. In what follows, the truth of this will come to light in many ways.
from True Christianity, Sections 46, 47