1487. And Jehovah smote Pharaoh with great plagues. That this signifies that the memory-knowledges were destroyed, is evident from the signification of "Pharaoh," as being memory-knowledge in general, consequently the memory-knowledges that belong to such knowledge; and from the signification of being "smitten with plagues," as being to be destroyed. As regards memory-knowledges the case is this. In childhood they are acquired for no other end than that of knowing; with the Lord, they were acquired from the delights and affection of truth. The memory-knowledges acquired in childhood are very numerous, but are disposed by the Lord into order so as to serve for use; first, to give the ability to think; then that they may be of use by means of thought; and lastly that this may take effect, that is to say that the very life may consist in use, and be a life of uses. These are the things performed by the memory-knowledges that are acquired in childhood; and without them the external man can never be conjoined with the internal, and at the same time become use. When man becomes use, that is, when he thinks all things from the end of use, and does all things for the end of use-if not by manifest reflection, still by tacit reflection from a nature acquired by so doing-then the memory-knowledges which have served the first use-that the man may become rational-being no longer of service, are destroyed; and so on. These are the things here meant by the words "Jehovah smote Pharaoh with great plagues."