Fury is a receding from good, and anger is a receding from truth.

In Genesis 49:20, this signifies turning away from confirmed truth. (Arcana Coelestia 6359)

In Exodus 15:7, this signifies the fury of lusts and their endeavor to inflict violence. (Arcana Coelestia 8284)

In Zephaniah 1:15, this signifies the advent of the Lord to judgment. (Divine Love and Wisdom 5)

In Revelation 14:10, this signifies truth from which comes good. (Apocalypse Revealed 635)

(Odkazy: Arcana Coelestia 3517, 3614, 4052)

In most cases, "mouth" in the Bible represents thought and logic, especially the kind of active, concrete thought that is connected with speech. The reason for this is pretty obvious, but it also holds when people, for instance, remove a stone from the mouth of a well, which represents gaining access to spiritual ideas. The mouth is used for eating as well as speaking, of course. In those circumstances, it represents our first, most external perception of a new spiritual idea or desire. This also makes sense, mirroring the way tasting food in the mouth gives us an instant impression of the quality of the food.