Although times change and knowledge increases, it is possible to discern a core of philosophical insight within the history of thought as a whole. Consider, for example, the principles of non-contradiction, finality and causality, as well as the concept of the person as a free and intelligent subject, with the capacity to know God, truth and goodness. Consider as well certain fundamental moral norms which are shared by all. These are among the indications that, beyond different schools of thought, there exists a body of knowledge which may be judged a kind of spiritual heritage of humanity. It is as if we had come upon an implicit philosophy, as a result of which all feel that they possess these principles, albeit in a general and unreflective way. Precisely because it is shared in some measure by all, this knowledge should serve as a kind of reference-point for the different philosophical schools. Once reason successfully intuits and formulates the first universal principles of being and correctly draws from them conclusions which are coherent both logically and ethically, then it may be called right reason or, as the ancients called it, orthós logos, recta ratio.
48. This rapid survey of the history of philosophy, then, reveals a growing separation between faith and philosophical reason. Yet closer scrutiny shows that even in the philosophical thinking of those who helped drive faith and reason further apart there are found at times precious and seminal insights which, if pursued and developed with mind and heart rightly tuned, can lead to the discovery of truth's way. Such insights are found, for instance, in penetrating analyses of perception and experience, of the imaginary and the unconscious, of personhood and intersubjectivity, of freedom and values, of time and history. The theme of death as well can become for all thinkers an incisive appeal to seek within themselves the true meaning of their own life. But this does not mean that the link between faith and reason as it now stands does not need to be carefully examined, because each without the other is impoverished and enfeebled. Deprived of what Revelation offers, reason has taken side-tracks which expose it to the danger of losing sight of its final goal. Deprived of reason, faith has stressed feeling and experience, and so run the risk of no longer being a universal proposition. It is an illusion to think that faith, tied to weak reasoning, might be more penetrating; on the contrary, faith then runs the grave risk of withering into myth or superstition. By the same token, reason which is unrelated to an adult faith is not prompted to turn its gaze to the newness and radicality of being.
For its part, dogmatic theology must be able to articulate the universal meaning of the mystery of the One and Triune God and of the economy of salvation, both as a narrative and, above all, in the form of argument. It must do so, in other words, through concepts formulated in a critical and universally communicable way. Without philosophy's contribution, it would in fact be impossible to discuss theological issues such as, for example, the use of language to speak about God, the personal relations within the Trinity, God's creative activity in the world, the relationship between God and man, or Christ's identity as true God and true man. This is no less true of the different themes of moral theology, which employ concepts such as the moral law, conscience, freedom, personal responsibility and guilt, which are in part defined by philosophical ethics.
68. Moral theology has perhaps an even greater need of philosophy's contribution. In the New Testament, human life is much less governed by prescriptions than in the Old Testament. Life in the Spirit leads believers to a freedom and responsibility which surpass the Law. Yet the Gospel and the Apostolic writings still set forth both general principles of Christian conduct and specific teachings and precepts. In order to apply these to the particular circumstances of individual and communal life, Christians must be able fully to engage their conscience and the power of their reason. In other words, moral theology requires a sound philosophical vision of human nature and society, as well as of the general principles of ethical decision-making.
107. I ask everyone to look more deeply at man, whom Christ has saved in the mystery of his love, and at the human being's unceasing search for truth and meaning. Different philosophical systems have lured people into believing that they are their own absolute master, able to decide their own destiny and future in complete autonomy, trusting only in themselves and their own powers. But this can never be the grandeur of the human being, who can find fulfilment only in choosing to enter the truth, to make a home under the shade of Wisdom and dwell there. Only within this horizon of truth will people understand their freedom in its fullness and their call to know and love God as the supreme realization of their true self.
The nations which at present increase rapidly should be encouraged to adopt the methods by which, in the West, the increase of population has been checked. Educational propaganda, with government help, could achieve this result in a generation. There are, however, two powerful forces opposed to such a policy: one is religion, the other is nationalism. I think it is the duty of all to proclaim that opposition to the spread of birth is appalling depth of misery and degradation, and that within another fifty years or so. I do not pretend that birth control is the only way in which population can be kept from increasing. There are others, which, one must suppose, opponents of birth control would prefer. War, as I remarked a moment ago, has hitherto been disappointing in this respect, but perhaps bacteriological war may prove more effective. If a Black Death could be spread throughout the whole world once in every generation survivors could procreate freely without making the world too full. 2b1af7f3a8