Arcana Coelestia # 5214
5214. And behold seven ears, thin. That this signifies memory-knowledges of no use, is evident from the signification of “ears,” as being memory-knowledges (of which above, n. 5212); and from the signification of “thin,” as being what is of no use. For “thin” is here contrasted with “full,” and that is said to be “full” in which there is use, or what is the same thing, in which there is good; for every good thing is of use; and therefore “thin” is what is of no use. The memory-knowledges of no use are those which have no other end than glory and pleasure. These ends are of no use, because they do not benefit the neighbor.
Mark 4:26-29
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He said, "The Kingdom of God is as if a man should cast seed on the earth,
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and should sleep and rise night and day, and the seed should spring up and grow, he doesn't know how.
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For the earth bears fruit: first the blade, then the ear, then the full grain in the ear.
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But when the fruit is ripe, immediately he puts forth the sickle, because the harvest has come."