7 By their own inner logic, these initial, somewhat philosophical reflections on the essence of love have now brought us to the threshold of biblical faith. We began by asking whether the different, or even opposed, meanings of the word “love” point to some profound underlying unity, or whether on the contrary they must remain unconnected, one alongside the other. More significantly, though, we questioned whether the message of love proclaimed to us by the Bible and the Church's Tradition has some points of contact with the common human experience of love, or whether it is opposed to that experience. This in turn led us to consider two fundamental words: eros , as a term to indicate “worldly” love and agape , referring to love grounded in and shaped by faith. The two notions are often contrasted as “ascending” love and “descending” love. There are other, similar classifications, such as the distinction between possessive love and oblative love ( amor concupiscentiae – amor benevolentiae ), to which is sometimes also added love that seeks its own advantage. In philosophical and theological debate, these distinctions have often been radicalized to the point of establishing a clear antithesis between them: descending, oblative love— agape —would be typically Christian, while on the other hand ascending, possessive or covetous love — eros —would be typical of non-Christian, and particularly Greek culture. Were this antithesis to be taken to extremes, the essence of Christianity would be detached from the vital relations fundamental to human existence, and would become a world apart, admirable perhaps, but decisively cut off from the complex fabric of human life. Yet eros and agape —ascending love and descending love—can never be completely separated. The more the two, in their different aspects, find a proper unity in the one reality of love, the more the true nature of love in general is realized. Even if eros is at first mainly covetous and ascending, a fascination for the great promise of happiness, in drawing near to the other, it is less and less concerned with itself, increasingly seeks the happiness of the other, is concerned more and more with the beloved, bestows itself and wants to “be there for” the other. The element of agape thus enters into this love, for otherwise eros is impoverished and even loses its own nature. On the other hand, man cannot live by oblative, descending love alone. He cannot always give, he must also receive. Anyone who wishes to give love must also receive love as a gift. Certainly, as the Lord tells us, one can become a source from which rivers of living water flow (cf. Jn 7:37-38). Yet to become such a source, one must constantly drink anew from the original source, which is Jesus Christ, from whose pierced heart flows the love of God (cf. Jn 19:34). In the account of Jacob's ladder, the Fathers of the Church saw this inseparable connection between ascending and descending love, between eros which seeks God and agape which passes on the gift received, symbolized in various ways. In that biblical passage we read how the Patriarch Jacob saw in a dream, above the stone which was his pillow, a ladder reaching up to heaven, on which the angels of God were ascending and descending (cf. Gen 28:12; Jn 1:51). A particularly striking interpretation of this vision is presented by Pope Gregory the Great in his Pastoral Rule . He tells us that the good pastor must be rooted in contemplation. Only in this way will he be able to take upon himself the needs of others and make them his own: “ per pietatis viscera in se infirmitatem caeterorum transferat ”. Saint Gregory speaks in this context of Saint Paul, who was borne aloft to the most exalted mysteries of God, and hence, having descended once more, he was able to become all things to all men (cf. 2 Cor 12:2-4; 1 Cor 9:22). He also points to the example of Moses, who entered the tabernacle time and again, remaining in dialogue with God, so that when he emerged he could be at the service of his people. “Within [the tent] he is borne aloft through contemplation, while without he is completely engaged in helping those who suffer: intus in contemplationem rapitur, foris infirmantium negotiis urgetur .”
Source: Deus Caritas Est (Vatican.va)