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.

'Remembering' denotes conjunction because the remembrance of anyone in the other life joins them together, because as soon as any spirit remembers another, he is brought so close that they can talk together. This is how angels and spirits can meet with anyone they have known, and anyone they have heard of, can see them present, and talk with them, when the Lord allows them 'to remember' them.

In Genesis 41:9, this signifies conjunction.

(Odkazy: Arcana Coelestia 5229)