Honor and glory are indeed due to God and to Him alone, but He will accept neither of them if they be not preserved in the honey of love. Love is sufficient of itself; it pleases by itself and on its own account. Love seeks no cause beyond itself and no fruit. It is its own fruit, its own enjoyment. I love because I love; I love that I may love. Love is a great thing provided it recurs to its beginning, returns to its origin, and draws always from that Fountain which is perpetually in flood. Of all the feelings and affections of the soul, love is the only one by which the creature, though not on equal terms, is able to respond to the Creator and to repay what it has received from Him. For when God loves us He desires nothing but to be loved. He loves for no other reason, indeed, than that He may be loved, knowing that by their love itself those who love Him are blessed.
-- St. Bernard of Clairvaux (1091-1153)