3 At so urgent a crisis, when so fierce and so pressing an onslaught is made upon the Christian name, it is Our office to point out the danger, to mark who are the adversaries, and to the best of Our power to make head against their plans and devices, that those may not perish whose salvation is committed to Us, and that the kingdom of Jesus Christ entrusted to Our charge may not stand and remain whole, but may be enlarged by an ever-increasing growth throughout the world.
Source: Humanum Genus (Vatican.va)