Mater et Magistra §217

²¹⁷ The most perniciously typical aspect of the modern era consists in the absurd attempt to reconstruct a solid and fruitful temporal order divorced from God, who is, in fact, the only foundation on which it can endure. In seeking to enhance man's greatness, men fondly imagine that they can do so by drying up the source from which that greatness springs and from which it is nourished. They want, that is, to restrain and, if possible, to eliminate the soul's upward surge toward God. But today's experience of so much disillusionment and bloodshed only goes to confirm those words of Scripture: "Unless the Lord build the house, they labor in vain that build it." (47)