129. Christian humanism does not reject science or technology, but embraces them with gratitude and realism, and grounds them within a higher vocation. The creative intelligence of humanity is a gift that can alleviate suffering and open up new possibilities, but it must remain ordered toward the common good, justice, the care of the vulnerable and creation. In this sense, the true alternative is not between enthusiasm and fear, but between two paths of development: a progress that serves individuals and peoples, or a progress that subjects them to the mentality of power.

Ultimately, the key question remains the one posed by Saint John Paul II: does AI “make human life on earth ‘more human’ in every aspect of that life? Does it make it more worthy of man?” [138] If the answer is yes, then we can recognize it as an opportunity to be embraced responsibly, on a path of patient, shared reconstruction, akin to the rebuilding of Jerusalem narrated in the Book of Nehemiah. If, however, power grows while the heart withers and human bonds fray, then we are faced with a new form of Babel — a construction that is grandiose, yet fundamentally dehumanizing.

130. Questioning this alternative path of progress and how we interpret and live it is ultimately a matter of examining our own hearts. The way we understand and shape relationships, work and institutions, in practice reveals our fundamental values. In the end, it all stems from what we hold most dear. This is a love that guides us as to what we truly cherish, both as individuals and as a society, and directs our lives and actions.

Saint Augustine described human history as a struggle between two loves, which give rise to two ways of inhabiting the world and living together — or two “cities,” as it were: on the one hand, the love of God and neighbor; on the other, the exclusive love of self. “Two loves have built two cities: the earthly city, the love of self even to the contempt of God; the heavenly city, the love of God even to the contempt of self.” [139] As throughout history, these two loves continue to contend for dominance in our hearts today. The age of AI is no exception: the construction of Babel or the rebuilding of Jerusalem begins within each one of us.