14 Concerning this war from outside, waged by the enemy without, "by which the Church is seen to be assailed on all sides, now in serried and open battle, now by cunning and by wily plots," We have frequently warned your vigilance, venerable brethren, and especially in the Allocution We delivered in the Consistory of December 16, 1907.
Source: Communium Rerum (Vatican.va)