That is because the love between two people, that unmistakable but usually indescribable property, occurs between two people. Once we have known love, we can bring it into our awareness, we can feel it emerge and emanate from us. This experience reaches beyond the love for the flesh and bones of the person we once knew on this earthly plane. Now loving is an attribute of us, regardless of who we share it with, regardless of what is given to us in return. This is a transcendent experience, a felt sense of being loving without needing anything in return.