This means, as is well known, that it comes down from generation to generation, from sons and daughters to grandchildren, and does not go up from them to the fathers and mothers of families. The reason it increases as it comes down is the love of being fruitful or being of service, and as regards the human race, the love of multiplying it. But the only source of this is from the Lord; in multiplying the human race He aims at the preservation of creation, and as its ultimate aim the heaven of angels, which is solely from the human race. Since the heaven of angels is the aim of all aims and so the love of all loves in the Lord, human souls have implanted in them not only the love of procreating, but also of loving what is successively procreated. This too is why this love is restricted to human beings and is not found in the case of any animal or bird. The reason why this love increases as it comes down is also due to a person's pride in his rank, which likewise grows as his rank becomes higher. It will be seen in a following section (xvi) that the love of rank and pride receives in itself the love of children which flows in from the Lord and makes it as if it were his own.