Fides et Ratio §21

²¹ For the Old Testament, knowledge is not simply a matter of careful observation of the human being, of the world and of history, but supposes as well an indispensable link with faith and with what has been revealed. These are the challenges which the Chosen People had to confront and to which they had to respond. Pondering this as his situation, biblical man discovered that he could understand himself only as “being in relation”—with himself, with people, with the world and with God. This opening to the mystery, which came to him through Revelation, was for him, in the end, the source of true knowledge. It was this which allowed his reason to enter the realm of the infinite where an understanding for which until then he had not dared to hope became a possibility. For the sacred author, the task of searching for the truth was not without the strain which comes once the limits of reason are reached. This is what we find, for example, when the Book of Proverbs notes the weariness which comes from the effort to understand the mysterious designs of God (cf. 30:1-6). Yet, for all the toil involved, believers do not surrender. They can continue on their way to the truth because they are certain that God has created them “explorers” (cf. Qoh 1:13), whose mission it is to leave no stone unturned, though the temptation to doubt is always there. Leaning on God, they continue to reach out, always and everywhere, for all that is beautiful, good and true.