7291. And thou shalt say unto Aaron. That this signifies influx and communication, namely, of the law Divine which Moses represents, with the doctrine which Aaron represents, is evident from the signification of "saying," when by Moses to Aaron, as being influx and communication (see n. 6291). "Saying" here signifies the same as "speaking," namely, both influx and communication (that "speaking" has this signification, see n. 7270). This influx and communication cannot be expressed in the historical part of the Word except by "saying," and "speaking." That the law Divine which Moses represents flowed into the doctrine which Aaron represents, is because the law Divine is internal truth, and doctrine is external truth; and it is a general rule that internal things flow into external things, and not vice versa, because internal things are purer and simple in comparison, while external things are gross, for they are the generals of internal things.