Isa. 54:8
“A distinction should be made between the appropriate anger of God, which is a righteous application of the law of justice, and the unbridled anger of a fallible mortal. The Lord had consistently counseled his children against anger (Matt. 5:21-22; 3 Ne. 11:21-22); furthermore, we have been instructed that the devil ‘is the father of contention …’ (3 Ne. 11:29). One who is angry loses the Spirit and his love of his fellowman (Moroni 9:3-5). In contrast, properly understood, God’s anger is a divine display of his love. It is a manifestation to truth (see 2 Ne. 1:24-27).” (Hoyt W. Brewster, Jr., Isaiah Plain and Simple, p. 266)