6607. It has been shown that when thoughts together with affections diffuse themselves, they circulate almost according to the form of the convolutions of the gray substance in the human brain. I have seen these circumfluxions for a long while: they circled round, bent inward, and wound in and out, as do the convolutions of the gray substance of the brains. But the forms of heaven are still more wonderful, and such as can by no means be comprehended, not even by angels; in such a form are the angelic societies in the heavens, and into such a form the thoughts of the angels flow, and almost in an instant to a great distance, because according to the infinitely perfect form.