Development must include not just material growth but also spiritual growth, since the human person is a “unity of body and soul”, born of God's creative love and destined for eternal life. The human being develops when he grows in the spirit, when his soul comes to know itself and the truths that God has implanted deep within, when he enters into dialogue with himself and his Creator. When he is far away from God, man is unsettled and ill at ease. Social and psychological alienation and the many neuroses that afflict affluent societies are attributable in part to spiritual factors.
A prosperous society, highly developed in material terms but weighing heavily on the soul, is not of itself conducive to authentic development. The new forms of slavery to drugs and the lack of hope into which so many people fall can be explained not only in sociological and psychological terms but also in essentially spiritual terms. The emptiness in which the soul feels abandoned, despite the availability of countless therapies for body and psyche, leads to suffering. There cannot be holistic development and universal common good unless people's spiritual and moral welfare is taken into account, considered in their totality as body and soul.
77. The supremacy of technology tends to prevent people from recognizing anything that cannot be explained in terms of matter alone. Yet everyone experiences the many immaterial and spiritual dimensions of life. Knowing is not simply a material act, since the object that is known always conceals something beyond the empirical datum. All our knowledge, even the most simple, is always a minor miracle, since it can never be fully explained by the material instruments that we apply to it. In every truth there is something more than we would have expected, in the love that we receive there is always an element that surprises us.
We should never cease to marvel at these things. In all knowledge and in every act of love the human soul experiences something “over and above”, which seems very much like a gift that we receive, or a height to which we are raised. The development of individuals and peoples is likewise located on a height, if we consider the spiritual dimension that must be present if such development is to be authentic. It requires new eyes and a new heart, capable of rising above a materialistic vision of human events, capable of glimpsing in development the “beyond” that technology cannot give. By following this path, it is possible to pursue the integral human development that takes its direction from the driving force of charity in truth.