5489. Into his sack. That this signifies wherever there was a receptacle in the natural, is evident from the signification of a "sack," as being a receptacle (of which in what follows); that it is in the natural, is because the subject treated of is the truths and memory-knowledges that are in the natural. Here a "sack" specifically signifies memory-knowledge, for the reason that as a sack is a receptacle of corn, so memory-knowledge is a receptacle of good, here of the good that is from truth (as above, n. 5487). Few know that memory-knowledge is a receptacle of good, because few reflect upon such things, and yet this may be known from the following considerations. The memory-knowledges that enter into the memory are always introduced by means of some affection; those not introduced by any affection do not stick there, but slip away. The reason of this is that in affection there is life, but not in memory-knowledges except through affection. From this it is plain that memory-knowledges always have conjoined with them such things as are of affection, or what is the same, as are of some love, consequently some good, for everything that is of love is called good, whether it be good or thought to be so. Memory-knowledges therefore together with these goods form as it were a marriage, and hence it is that when this good is excited, the memory-knowledge with which it is conjoined is also at once excited; and conversely, when the memory-knowledge is recalled, the good conjoined with it also comes forth, as everyone can put to the test in himself if he chooses.
 This then is the reason why with the unregenerate, who have rejected the good of charity, the memory-knowledges which are truths of the church, have adjoined to them such things as are of the love of self and of the world, thus evil things, which by reason of the delight that is in them they call good, and also by wrong interpretations make out to be good. These memory-knowledges make a fair show when the loves in question reign universally, and according to the degree in which they reign. But with the regenerate the memory-knowledges which are truths of the church have joined with them such things as are of love toward the neighbor and love to God, thus genuine good things. These are stored up by the Lord in the truths of the church with all who are being regenerated; and therefore when the Lord instills into such persons a zeal for good, these truths show themselves in their order; and when He instills a zeal for truth, this good is present and enkindles it. From all this it is evident how the case is with memory-knowledges and with truths-that they are receptacles of good.