9 We know very well, Venerable Brethren, that all these efforts will come to nought, since without doubt, and in His own appointed time, "God shall arise, and his enemies shall be scattered" ( Ps . Ixvii. 2); We know that the gates of Hell shall never prevail (cf. Matt . xvi. 18); We know that Our Divine Redeemer, as was foretold of Him, "shall strike the earth with the rod of his mouth" (cf. Isaias xi. 4); and there will be a dreadful hour for those wretched men, when they shall fall "into the hands of the living God" (cf. Heb x. 31).
Source: Caritate Christi Compulsi (Vatican.va)