Fides et Ratio §104

¹⁰⁴ Philosophical thought is often the only ground for understanding and dialogue with those who do not share our faith. The current ferment in philosophy demands of believing philosophers an attentive and competent commitment, able to discern the expectations, the points of openness and the key issues of this historical moment. Reflecting in the light of reason and in keeping with its rules, and guided always by the deeper understanding given them by the word of God, Christian philosophers can develop a reflection which will be both comprehensible and appealing to those who do not yet grasp the full truth which divine Revelation declares. Such a ground for understanding and dialogue is all the more vital nowadays, since the most pressing issues facing humanity—ecology, peace and the co-existence of different races and cultures, for instance—may possibly find a solution if there is a clear and honest collaboration between Christians and the followers of other religions and all those who, while not sharing a religious belief, have at heart the renewal of humanity. The Second Vatican Council said as much: “For our part, the desire for such dialogue, undertaken solely out of love for the truth and with all due prudence, excludes no one, neither those who cultivate the values of the human spirit while not yet acknowledging their Source, nor those who are hostile to the Church and persecute her in various ways”. A philosophy in which there shines even a glimmer of the truth of Christ, the one definitive answer to humanity's problems, will provide a potent underpinning for the true and planetary ethics which the world now needs.