17 True, no one has ever seen God as he is. And yet God is not totally invisible to us; he does not remain completely inaccessible. God loved us first, says the Letter of John quoted above (cf. 4:10), and this love of God has appeared in our midst. He has become visible in as much as he “has sent his only Son into the world, so that we might live through him” ( 1 Jn 4:9). God has made himself visible: in Jesus we are able to see the Father (cf. Jn 14:9). Indeed, God is visible in a number of ways. In the love-story recounted by the Bible, he comes towards us, he seeks to win our hearts, all the way to the Last Supper, to the piercing of his heart on the Cross, to his appearances after the Resurrection and to the great deeds by which, through the activity of the Apostles, he guided the nascent Church along its path. Nor has the Lord been absent from subsequent Church history: he encounters us ever anew, in the men and women who reflect his presence, in his word, in the sacraments, and especially in the Eucharist. In the Church's Liturgy, in her prayer, in the living community of believers, we experience the love of God, we perceive his presence and we thus learn to recognize that presence in our daily lives. He has loved us first and he continues to do so; we too, then, can respond with love. God does not demand of us a feeling which we ourselves are incapable of producing. He loves us, he makes us see and experience his love, and since he has “loved us first”, love can also blossom as a response within us. In the gradual unfolding of this encounter, it is clearly revealed that love is not merely a sentiment. Sentiments come and go. A sentiment can be a marvellous first spark, but it is not the fullness of love. Earlier we spoke of the process of purification and maturation by which eros comes fully into its own, becomes love in the full meaning of the word. It is characteristic of mature love that it calls into play all man's potentialities; it engages the whole man, so to speak. Contact with the visible manifestations of God's love can awaken within us a feeling of joy born of the experience of being loved. But this encounter also engages our will and our intellect. Acknowledgment of the living God is one path towards love, and the “yes” of our will to his will unites our intellect, will and sentiments in the all- embracing act of love. But this process is always open-ended; love is never “finished” and complete; throughout life, it changes and matures, and thus remains faithful to itself. Idem velle atque idem nolle —to want the same thing, and to reject the same thing—was recognized by antiquity as the authentic content of love: the one becomes similar to the other, and this leads to a community of will and thought. The love-story between God and man consists in the very fact that this communion of will increases in a communion of thought and sentiment, and thus our will and God's will increasingly coincide: God's will is no longer for me an alien will, something imposed on me from without by the commandments, but it is now my own will, based on the realization that God is in fact more deeply present to me than I am to myself. Then self- abandonment to God increases and God becomes our joy (cf. Ps 73 :23-28).
Source: Deus Caritas Est (Vatican.va)