The second dimension of faithfulness is called reception, acceptance. The "quomodo fiet?" is changed, on Mary's lips, to a "fiat." Let it be done, I am ready, I accept: this is the crucial moment of faithfulness, the moment in which man perceives that he will never completely understand the "how"; that there are in God's plan more areas of mystery than of clarity; that, however he may try, he will never succeed in understanding it completely. It is then that man accepts the mystery, gives it a place in his heart, just as "Mary kept all these things, pondering them in her heart" (Lk 2:19; cf. Lk 3:15). It is the moment when man abandons himself to the mystery, not with the resignation of one who capitulates before an enigma or an absurdity, but rather with the availability of one who opens up to be inhabited by something-by Someone!-greater than his own heart. This acceptance takes place, in short, through faith, which is the adherence of the whole being to the mystery that is revealed.