9374. Thou and Aaron. That this signifies the Word in the internal sense and the external sense, is evident from the representation of Moses, as being the Word (of which above, n. 9372). But when Aaron, who was his brother, is joined to him, then Moses represents the Word in the internal sense, and Aaron the Word in the external sense (as also above, n. 7089, 7382).

To "send away" means creating a separation of spiritual states. This phrase is used a great deal in Exodus, when Moses repeatedly calls on Pharaoh to send the Children of Israel away to worship the Lord. In that case, Pharaoh and the Egyptians represent people who use scientific knowledge to attack spiritual ideas; the Lord through the plagues will force them to stop.

(References: Arcana Coelestia 3182, 3973, 5962, 6912, 7037, 7092, 7349, 7439, 7460, 7501, 7593, 7654, 7768, 8648)

7382. Stretch forth thy hand with thy rod. That this signifies the power of internal truth through external truth, is evident from the signification of “hand,” as being spiritual power, which is that of internal truth; and from the representation of a rod, as being natural power, which is that of external truth (see n. 6947, 6948). (That all power in the spiritual world belongs to truth, see n. 3091, 3387, 4931, 6344, 6423, 6948.) As Moses represents the internal law, which is the same as internal truth, and Aaron represents the external law, which is the same as external truth, and as internal truth flows into external and gives it power (n. 7381), therefore by the word of Moses to Aaron, “Stretch forth thy hand with thy rod,” is signified the power of internal truth through external truth.