Arcana Coelestia # 7825
7825. 'And Jehovah said to Moses and to Aaron' means instructions given by God's truth. This is clear from the meaning of 'saying', when the message is from Jehovah regarding things to be established within the Church, as giving instructions, for 'saying' includes what comes after it; and from the representation of 'Moses and Aaron' as God's truth, 'Moses' truth that emanates directly from God, 'Aaron' that which does so indirectly, dealt with in 7009, 7010, 7089, 7382.
Arcana Coelestia # 7009
7009. 'And it will happen, that he will be for you as a mouth' means the truth contained in doctrinal teachings, which also goes forth from the Lord in an indirect way. This is clear from the representation of Aaron, who 'will be for Moses as a mouth', as doctrinal teachings, dealt with in 6998; and from the meaning of 'being for Moses as a mouth' as the utterance or declaration of it, dealt with in 6987. The reason why the words of explanation are 'the truth contained in doctrinal teachings, which also goes forth from the Lord in an indirect way' is that the truth contained in doctrinal teachings, which 'Aaron' represents, is the kind of truth that can be heard and discerned by angels and by men. Such truth is what goes forth in an indirect way from the Lord. But the kind of truth that is represented by 'Moses' goes forth directly from the Lord, and cannot be heard or discerned by men, nor even by angels, see 6982, 6985, 6996, 7004.