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.

778. "And wine, oil, flour, wheat." This symbolically means that these Roman Catholics no longer have any worship that springs from celestial truths and goods, because they have nothing inwardly in their worship that corresponds to the aforesaid things.

This statement is similar to ones explained just above and in previous numbers, the only difference being that the valuables here symbolize celestial goods and truths.

Just what goods and truths are called celestial, and what spiritual, may be seen in no. 773 above. It may also be seen that the Roman Catholics meant here possess none of these, nor are there any in their worship. For, as we said above, the goods and truths of doctrine are present in worship as the soul is in the body. Consequently worship without these is a lifeless worship. Of such a character is worship that is reverent in outward appearances, but which has in it no internal reverence.

That wine symbolizes truth springing from the goodness of love may be seen in no. 316 above. That oil symbolizes the goodness of love will be seen in the next number. Flour symbolizes celestial truth, and wheat symbolizes celestial good.

[2] Wine, oil, flour and wheat symbolize the truths and goods in worship, because they were the ingredients in drink offerings and grain offerings, which were offered on the altar along with other sacrifices, and sacrifices and other offerings offered on the altar symbolize worship, since it was in these that the Israelites' worship chiefly consisted.

That drink offerings, which were ones of wine, were offered on the altar along with other sacrifices, can be seen in Exodus 29:40; Leviticus 23:12-13, 18-19; Numbers 15:2-15; 28:11-15, 18-31; 29:1-7ff.; and also in Isaiah 57:6; 65:11; Jeremiah 7:18; 44:17-19; Ezekiel 20:28; Joel 1:9; Psalms 16:4; Deuteronomy 32:38.

That oil was also offered on the altar along with sacrifices, can be seen in Exodus 29:40.

That grain offerings, which consisted of wheat flour, were offered on the altar along with other sacrifices, can be seen in Exodus 29:40).

It can be seen from this that these four articles - wine, oil, flour and wheat - were sacred and celestial elements in their worship.