Conscious and responsible in pontifical texts

Starting in 1944 with Pope Pius XII's we begin to find phrases containing the couple "conscious and responsible" in various pontifical documents, including documents addressed specifically to Cardijn and the YCW.

With John XXIII, we find the phrase beginning to appear in social encyclicals, beginning with Mater et Magistra, the encyclical proposed to Pope John by Cardijn, and for which he prepared a draft outline.