6624. As man thinks from what is sensuous, such things are obscure to him, nay, so obscure that he does not know what an idea is, and especially that thought is divided into ideas, as speech is into words; for thought appears to him continuous, and not discrete, when yet the ideas of thought are the words of spirits, and the ideas of a thought yet more interior are the words of angels. As ideas are the words of their speech, they are also sonorous among spirits and angels; hence the silent thought of man is audible to spirits and angels when it so pleases the Lord. How perfect the ideas of thought are in comparison with the words of speech, may be seen from the fact that a man can think more things within a minute than he can utter or write in an hour. The same could also be seen from speech with spirits and angels, for then in a moment I have filled a general subject with singulars, with the affection adjoined, whence the angels and spirits distinctly apprehended all things, and many more, which appeared about the subject like a cloud.