The Bible often speaks of signs and miracles as things that convinced people of the Lord's leading. "Signs" convince people to believe intellectually, and "miracles" convince people to believe emotionally. For instance, it was a "sign" for the shepherds that they would find the newborn Jesus wrapped in swaddling clothes, lying in a manger. This was not something that defied explanation; there is nothing impossible about a baby being laid in a manger. On the other hand miracles such as the Nile turning into blood, the Red Sea parting or water being made wine were apparently impossible, striking awe and fear in the hearts of observers and thus compelling the emotions. Both signs and miracles, however, are external events that could only force people into compliance out of fear and awe, which is an external form of worship that has little to do with eternal life. The Lord used them in Biblical times because the people of that time were external in nature, and the Lord had to force them into forms of worship to preserve spiritual ideas and to allow for the Bible to be written. Through His advent and His teachings He opened the possibility that we could understand His spiritual meanings, which would allow us to believe and live internally, not just externally.

435. As regards 'the man and his wife' here being used to mean the new Church which earlier on was meant by 'Adah and Zillah', this nobody can know or deduce from the sense of the letter, for previously 'the man (homo) and his wife' meant the Most Ancient Church and its descendants. The point is clear however from the internal sense, and also from the fact that a little further on, in verses 3-4 of the next chapter, reference is again made, though the wording is entirely different, to the man and his wife begetting Seth. At that point the first generation of the descendants of the Most Ancient Church is meant. Unless something different were meant at this point there would be no need to say the same thing again. A parallel to this exists in Chapter 1, where the subject is the creation of man, and also of the fruits of the earth, and of beasts; followed by Chapter 2, where similar events are described, the reason for the similarity being, as has been stated, that Chapter 1 deals with the creation of the spiritual man, Chapter 2 with the creation of the celestial man. When this kind of repetition of one and the same person or thing occurs, something different is meant on the first occasion from the second. But the exact meaning cannot possibly be known except from the internal sense. The actual train of thought in like manner establishes the meaning here. And there is the added consideration that 'man and wife' is a general expression meaning that Church, which is the subject here and from which the new Church was born.