491. And they shall prophesy a thousand two hundred and sixty days, signifies that these two, the acknowledgment of the Lord, and a life according to the precepts of the Decalogue, which are the two essentials of the New Church, are to be taught until the end and the beginning. That these two, the acknowledgment of the Lord, and a life according to the precepts of the Decalogue, are the two essentials of the New Church, and are meant by "the two witnesses," may be seen above (n. 490); and that "to prophesy" signifies to teach (n. 8, 133). By "one thousand two hundred and sixty days," is signified until the end and the beginning, that is, until the end of the former church, thus to the beginning of the New. The reason why this is signified by this number, is, because it has the same signification as three and a half, and by three and a half is signified an end and a beginning (n. 505); for the number one thousand two hundred and sixty, when reduced into years, makes three years and a half. The like is signified by the same number in the next chapter:
And the woman fled into the wilderness, where she hath a place prepared of God, that they should feed her there a thousand two hundred and sixty days (Rev. 12:6).