28 Today also, as We have said, Venerable Brothers, the Catholic religion in many places has been exposed to grave danger. It is necessary, therefore, to defend it by every available means, to explain it, to propagate it. In this great cause may not only those Sacred Ministers help you, who by the office entrusted to them must give you their trained assistance, but also the laity, who are most generous and ready to fight the battle of God for peace.
Source: Invicti Athletae (Vatican.va)