264. Those who know nothing about heaven, and who are unwilling to have any other idea of it than as of something purely atmospherical, in which the angels fly about as intellectual minds, having no sense of hearing or seeing, are unable to conceive that the angels have speech and writing; for they place the existence of everything real in what is material; and yet the writings in heaven have as real an existence as those in the world, and the angels there have everything that is useful for life and useful for wisdom.