“All ancient philosophers, poets, and moralists agree that love is a striving, an aspiration of the “lower” toward the “higher,” the “unformed” toward the “formed,” … “appearance” towards “essence,” “ignorance” towards “knowledge,” a “mean between fullness and privation,” as Plato says in the Symposium. … The universe is a great chain of dynamic spiritual entities, of forms of being ranging from the “prima materia” up to man—a chain in which the lower always strives for and is attracted by the higher, which never turns back but aspires upward in its turn. This process continues up to the deity, which itself does not love, but represents the eternally unmoving and unifying goal of all these aspirations of love. Too little attention has been given to the peculiar relation between this idea of love and the principle of the “agon,” the ambitious contest for the goal, which dominated Greek life in all its aspects—from the Gymnasium and the games to dialectics and the political life of the Greek city states. Even the objects try to surpass each other in a race for victory, in a cosmic “agon” for the deity. Here the prize that will crown the victor is extreme: it is a participation in the essence, knowledge, and abundance of “being.” Love is only the dynamic principle, immanent in the universe, which sets in motion this great “agon” of all things for the deity.
Let us compare this with the Christian conception. In that conception there takes place what might be called a reversal in the movement of love. The Christian view boldly denies the Greek axiom that love is an aspiration of the lower towards the higher. On the contrary, now the criterion of love is that the nobler stoops to the vulgar, the healthy to the sick, the rich to the poor, the handsome to the ugly, the good and saintly to the bad and common, the Messiah to the sinners and publicans. The Christian is not afraid, like the ancient, that he might lose something by doing so, that he might impair his own nobility. He acts in the peculiarly pious conviction that through this “condescension,” through this self-abasement and “self-renunciation” he gains the highest good and becomes equal to God. …
There is no longer any “highest good” independent of and beyond the act and movement of love! Love itself is the highest of all goods! The summum bonum is no longer the value of a thing, but of an act, the value of love itself as love—not for its results and achievements. …
Thus the picture has shifted immensely. This is no longer a band of men and things that surpass each other in striving up to the deity. It is a band in which every member looks back toward those who are further removed from God and comes to resemble the deity by helping and serving them.”

Source: Das Ressentiment im Aufbau der Moralen (1912), L. Coser, trans. (1961), pp. 85-88