Arcana Coelestia # 2558
2558. And she became my wife. That this signifies that spiritual truth was conjoined with the celestial by the mediumship of rationality, is evident from the representation of Sarah as Abraham’s wife, as being spiritual truth conjoined with celestial good (see n. 2507); and from the representation of the same as his sister, as being rational truth (n. 2508). Hence that she became his wife, from being his sister, signifies that by rationality as a medium spiritual truth was conjoined with the celestial. (How these things are circumstanced is evident from what has been said just above, n. 2557)
Arcana Coelestia # 2507
2507. Of Sarah his wife. That this signifies spiritual truth conjoined with the celestial, is evident from the signification of “Sarah” as a wife, as being intellectual truth conjoined with the Divine good, or what is the same, spiritual truth conjoined with the celestial (see n. 1468, 1901, 2063, 2065, 2172, 2173, 2198). What the spiritual is, and what the celestial, has often been stated before (see n. 1155, 1577, 1824, 2048, 2088). That is called Celestial, which is of good, that is, which is of love to the Lord and of charity toward the neighbor; and that Spiritual, which is of truth, that is, which is of faith derived from those loves.