Gaudium et Spes: The Church in the Modern World
By John Graveline, Director of Parish Life
August 30, 2026
“In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God. All things came to be through him, and without him nothing came to be. What came to be through him was life, and this life was the light of the human race; the light shines in the darkness, and the darkness has not overcome it . . . And the Word become flesh and made his dwelling among us.”
John 1:1-5, 14
As we continue to reflect upon the documents of Vatican II at the beginning of the Year of the Holy Spirit, this week we conclude our consideration the question “What is our mission as modern Catholics?” by exploring Vatican II’s Pastoral Constitution on the Church in the Modern World (also known by its Latin title Gaudium et spes). This document is the heart of the message of Vatican II.
When we began our consideration of the documents of Vatican II at the start of this Year of the Holy Spirit in May, we commenced by recalling the context in which Vatican II was convoked by Pope St. John XXIII in 1962. The first half of the 20th century had been marked by unprecedented destruction of human life: two World Wars, political revolutions, genocides, the Holocaust, and ever more advanced technology being used to destroy human life in greater numbers culminating in the detonation of two nuclear weapons in Japan. Humanity itself was at a crisis point, thus Vatican II was called not in the first instance for the purpose of internal church reform, but as the Catholic Church’s response to the inhumanity that marked the 20th century. By the 1960’s, people were rightly concerned with the possibility of the destruction of the world at our own hands due to the “arms race” and the widening gap between the increasing prosperity of some peoples and the crushing poverty of others, leading many people to lose hope in each other and in the future. “In the midst of it all stands the human person, at once the author and the victim of mutual distrust, animosity, conflict and woe.” (Constitution on the Church in the Modern World, no. 8)
Regardless of the reason, when we lose a sense of God as Creator and Father of all, we also lose the sense that we are all sisters and brothers with the same Father, thus justifying atrocities and dehumanization.
What was at the root of this seemingly hopeless situation of the world? The Constitution on the Church in the Modern World saw the roots of modern nihilism in atheism. Atheism can take many different forms. Some people wrongfully saw science and technology in opposition to the idea of God, as if human beings could only progress to the extent that “religious superstition” is overcome. Others were preached a form of religion (even by Christians) that was so inadequate that when they rejected that proclamation, they believed that they were rejecting the true God of Revelation. Some had lost belief in the goodness of a God who could allow the atrocities of the 20th century to happen. Another form of atheism was political. Communism as a political theory begins with the rejection of the concept of God, and Communist countries and other forms of atheistic nationalism (i.e. Nazism) actively imprisoned and killed millions of people for no other reason except their belief in God, which threatened their political agenda. In affluent nations, many people neglected God in the midst of their luxuries, living a sort of “practical atheism” in spite of sometimes even considering themselves believers. In our times, this is referred to as Moralistic Therapeutic Deism. Regardless of the reason, when we lose a sense of God as Creator and Father of all, we also lose the sense that we are all sisters and brothers with the same Father, thus justifying atrocities and dehumanization.
What is interesting is that Vatican II did not simply outright condemn atheists per se, but rather to enter into dialogue with modern people to “seek out the secret motives which lead the atheistic mind to deny God,” for “atheism must be countered both by presenting true teaching in a fitting manner and by the full and completer life of the Church and her members. For it is the function of the Church to render God the Father and his incarnate Son present and as it were visible, while ceaselessly renewing and purifying herself under the guidance of the Holy Spirit.” (Constitution on the Church in the Modern World, no. 21)
“It is the human person who must be saved . . . it is the human person, therefore, who is the key to this discussion, considered whole and entire, with body and soul, heart and conscience, mind and will.” (Constitution on the Church in the Modern World, no. 3)
The way forward for the Church in the modern world is the way of Jesus, the way of Incarnation. Jesus became one of us, called forth the good in all people, and offered the hope of new and eternal life. “It is the human person who must be saved . . . it is the human person, therefore, who is the key to this discussion, considered whole and entire, with body and soul, heart and conscience, mind and will.” (Constitution on the Church in Modern World, no. 3) Here we arrive at the central truth about humanity proclaimed by Vatican II. We read a few weeks ago that Jesus fully reveals God the Father and his love to humanity, but now we read that “in reality it is only in the mystery of the Word made flesh that the mystery of the human person becomes clear . . . Christ the new Adam . . . fully reveals the humans to themselves, and brings to light their most high calling.” (Constitution on the Church in the Modern World, no. 22) Jesus, the “image of the invisible God” in human flesh shows us and empowers us to fulfill what it means to be human beings created in the image of God (Colossians 1:15, Genesis 1:26-27) and to realize our dignity which is our calling to live in communion with God. (Constitution on the Church in the Modern World, no. 19)
Another central truth about what it means to be human in “the image of God” is that God did not “create humans as solitary beings . . . by our innermost nature humans are social beings; and it we do not enter into relations with others we can neither live nor develop our gifts.” (Constitution on the Church in the Modern World, no. 12) In other words, Christianity is not about individualized salvation aimed solely at a future reward in the afterlife. Our belief in the immortality of the soul and of the life to come do not in any way lessen our responsibility to enter into the work of realizing the kingdom of God right here and now in our world in solidarity with all humans. This is the point at which the Constitution on the Church in the Modern World moves into discussion of every human institution and issue: marriage and family, science and culture, economics and politics, peace and social justice. The Church is not called to control these aspects of human life, but to enter into them in an incarnational way, the way that Jesus entered into the whole of human life and history not to control and dominate but to heal and serve, bringing God’s presence and the hope for new life in a communion with God and all people in love.
We have now concluded our reflections on the question ““What is our mission as modern Catholics?” Next week, we will conclude our summer reading of the documents of Vatican II at the beginning this Year of the Holy Spirit by reading the Vatican II’s Constitution on the Sacred Liturgy (also known by its Latin title Sacrosanctum Concilium). Click here to read this document on the Vatican website.
John