Since they correlate in the Grand Man with the ability to form mental images spirits belonging to the planet Jupiter engage to only a small extent in speaking and to a large extent in thinking. When they do engage in speech it is non-verbal, differing from other spirits' kinds of speech in that it is contained not so much in audible sound as in a kind of subdued murmur which is inwardly fluent. Thought itself is converted into speech in this kind of way. The reason why is that by disposition they come between those who are spiritual and those who are celestial. For the speech of those who are spiritual is contained in audible sound; and they translate the whole of their thought into such speech. To know their thought therefore one must gather it from spoken words. But this is not so with those who are celestial. Instead, what is in their will employs something of thought to roll itself into a kind of wave, which then makes an impact on and stirs another's will according to the state of the subject.