29 Precisely because faith-knowledge is linked to the covenant with a faithful God who enters into a relationship of love with man and speaks his word to him, the Bible presents it as a form of hearing; it is associated with the sense of hearing. Saint Paul would use a formula which became classic: fides ex auditu , "faith comes from hearing" ( Rom 10:17). Knowledge linked to a word is always personal knowledge; it recognizes the voice of the one speaking, opens up to that person in freedom and follows him or her in obedience. Paul could thus speak of the "obedience of faith" (cf. Rom 1:5; 16:26). Faith is also a knowledge bound to the passage of time, for words take time to be pronounced, and it is a knowledge assimilated only along a journey of discipleship. The experience of hearing can thus help to bring out more clearly the bond between knowledge and love. At times, where knowledge of the truth is concerned, hearing has been opposed to sight; it has been claimed that an emphasis on sight was characteristic of Greek culture. If light makes possible that contemplation of the whole to which humanity has always aspired, it would also seem to leave no space for freedom, since it comes down from heaven directly to the eye, without calling for a response. It would also seem to call for a kind of static contemplation, far removed from the world of history with its joys and sufferings. From this standpoint, the biblical understanding of knowledge would be antithetical to the Greek understanding, inasmuch as the latter linked knowledge to sight in its attempt to attain a comprehensive understanding of reality. This alleged antithesis does not, however, correspond to the biblical datum. The Old Testament combined both kinds of knowledge, since hearing God’s word is accompanied by the desire to see his face. The ground was thus laid for a dialogue with Hellenistic culture, a dialogue present at the heart of sacred Scripture. Hearing emphasizes personal vocation and obedience, and the fact that truth is revealed in time. Sight provides a vision of the entire journey and allows it to be situated within God’s overall plan; without this vision, we would be left only with unconnected parts of an unknown whole.
Source: Lumen Fidei (Vatican.va)