It is worth knowing that in the heavens, writing flows spontaneously from thoughts. It is done with such ease that it is as though the thought projected itself. The hand does not pause over the choice of some particular word, because the words—both the spoken and the written ones—are responsive to their individual thoughts, and anything that is so responsive is natural and spontaneous.
There are also things written in the heavens without the use of hands, simply in response to thoughts; but these do not last.
from Heaven and Hell, Section 262
Secrets of Heaven 