The spiritual reasons are so that the human race may be multiplied, and from this the heaven of angels may be enlarged. Thus people may be born who will become angels, serving the Lord by being useful in heaven, and by their association with people also on earth. Every person has angels given by the Lord to associate with him, and they are so closely linked that if they were taken away the person would instantly die.

The natural reasons why these two loves are linked are so that people may be born who will perform services in human communities, and so that people may be incorporated into communities as members. These are the natural and spiritual reasons for the love of children and for conjugial love, as married couples themselves think and sometimes admit, when they say that they have enriched heaven with as many angels as they have descendants, and that they have adorned their communities with as many servants as they have children.