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.

8562. ‘Et nulla aqua ad bibendum populo’: quod significet defectum veri et inde recreationis, constat ex significatione ‘aquae’ quod sit verum ¹ fidei, de qua n. 2702, 3058, 3424, 4976, 5668, et ex significatione ‘bibere’ quod sit instrui in veris fidei, et recipere illa, de qua n. 3069, 3772, 4017, 4018, hic recreari, nam sicut aqua et potus recreant vitam naturalem, ita vera et cognitiones veri vitam spiritualem, ² nam qui in vita spirituali est desiderat sustentationem ejus a talibus quae vocantur cibi et potus caelestes, quae sunt bona et vera fidei, aeque ac qui in vita naturali sustentationem a talibus quae sunt cibi et potus naturales.

[2] Quod nunc agatur de tentatione quoad verum, est quia mox prius actum est de tentatione quoad bonum, post quam tentationem acceperunt mannam, per quam significatur bonum; cum ³ enim homo donatur bono a Domino, tunc venit in desiderium veri, et hoc desiderium accenditur secundum defectum ejus, bonum enim jugiter appetit verum; omnis affectio genuina veri ex bono est; se habet ⁴ hoc sicut cibus, quod is absque potu nequeat nutricioni esse vitae naturali, et quoque quod cibus appetat potum, cum quo conjungatur, ut inserviat usui; haec nunc causa est cur tentatio quoad verum sequatur immediate tentationem quoad bonum; tentatio ⁵ aggreditur id quod amat et desiderat homo, n. 4274, 4299.

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