6985. 'For I am heavy in mouth and heavy in tongue' means that voice and speech from the Divine is not heard and not discerned. This is clear from the meaning of 'mouth' as voice, and from the meaning of 'tongue as speech. 'Mouth' means voice because it is the organ used by the voice, and 'tongue means speech because it is the organ used in speech. Anyone can see what the difference is between voice and speech, and that 'voice' is used in connection with being heard, but 'speech' with being discerned. In the literal sense written as history, where reference is made to Moses' being a person who could speak only with difficulty, there is no other way than 'heavy in mouth and heavy in tongue' to express the matter. But when this expression passes into the internal sense it is discerned by the angels in connection with the subject there; and when it is said of the Divine it is discerned to mean that the voice from the Divine cannot be heard directly, nor the speech from Him be discerned directly, only indirectly through spirits, as accords with what has been stated above in 6982.

6982. 'I am not a man of words' means that he is lacking in speech. This is clear from the meaning of 'a man of words' as the fact that he is not an able speaker, and so is lacking in speech. What all this entails must be stated. The subject here in the highest sense is the Lord, for 'Moses' represents the Lord in respect of the law of God, thus in respect of God's truth. Truth that goes forth directly from the Divine cannot be heard by anyone, not even by any angel; if what is Divine is to be heard it must first be made human, and it is made human when it passes through the heavens. When it has passed through the heavens it is presented in a human form and becomes speech, speech which is uttered by spirits who, while they are in that state, are called the Holy Spirit. But the Holy Spirit is said to come forth from the Divine because what is holy with a spirit, namely the holy truth uttered by him at that time, comes forth from the Lord. From all this one may recognize that truth coming forth directly from the Divine cannot be presented to anyone as spoken word or speech except by means of the Holy Spirit. This is what is meant in the highest sense when Moses, who represents the Lord in respect of God's truth, says that he is 'not a man of words', and by the fact that Aaron his brother was to be attached to him; Aaron was to serve him in place of his mouth, and he was to serve Aaron in God's place.