Mater et Magistra §209

²⁰⁹ It has been claimed that in an era of scientific and technical triumphs such as ours man can well afford to rely on his own powers, and construct a very good civilization without God. But the truth is that these very advances in science and technology frequently involve the whole human race in such difficulties as can only be solved in the light of a sincere faith in God, the Creator and Ruler of man and his world.