2 For this mighty movement of those who would console their Father and help their brethren in their public and private afflictions, words can hardly express Our emotion and Our gratitude. These feelings We have already made known on more than one occasion to individuals, but We cannot delay any longer to give a public expression of Our thanks, first of all, to you, venerable brethren, and through you to all the faithful entrusted to your care.
Source: Communium Rerum (Vatican.va)