6376. 'And the foal of his she-ass to the outstanding vine' means truth from the rational for the internal Church. This is clear from the meaning of 'the vine' as the spiritual Church, dealt with in 1069, 5113, so that 'the outstanding vine' means the internal Church (for the internal part of the Church is more outstanding than the external part of it); and from the meaning of 'the foal of a she-ass' as rational truth, dealt with in 2781. The external part of the Church is distinct and separate from the internal, in that it is located in the natural, thus in the external man, whereas the internal part is located in the rational, thus in the internal man. Members of the external Church are governed by truth, those of the internal Church by good. The former are motivated not so much by the good of charity as they are by the truth of faith, whereas the latter are motivated by the good of charity and from this by the truth of faith. Members of the internal Church are the ones meant by 'the outstanding vine', but members of the external Church are the ones meant by 'the vine'.

Water generally represents “natural truth,” or true concepts about day-to-day matters and physical things. Since all water ultimately flows into the seas, then, it follows that a sea represents a huge agglomeration of such natural truths -- usually all of the natural truth a person has, or all the natural truth a church has. Water in the sea mixes freely, and is easily stirred up by winds and currents. This is also true of the concepts we hold about natural things -- they are not all related to each other, and when relationships do exist they usually can change without damaging the concepts themselves. Many of the concepts are easily disputed, and arguments can arise like waves on the ocean -- generally with little effect other than a mixing of waters. But the sea also offers great bounty. We draw fish from it (spiritual food), float ships (doctrinal systems) on it, bathe in it (using true concepts to purify ourselves), and the water that evaporates from it and falls as rain (purer forms of truth that can attach to desires for good) makes life possible.