10 After pointing out that God wants to be loved by men rather than feared and honored, he adds this wise and penetrating observation: "Love is sufficient of itself; it pleases of itself, and for the sake of loving. A great thing is love, if yet it returns to its Principle, if it is restored to its Origin, if it finds its way back again to its fountain-head, so that it may thus be enabled to flow on unfailingly. Amidst all the emotions, sentiments, and feelings of the soul, love is outstanding in this respect, namely, that it alone among created things, has the power to correspond with, and to make return to the creator in kind, though not in equality."
Source: Doctor Mellifluus (Vatican.va)