306. I have been told from heaven that the most ancient people, because their interiors were turned heavenwards, had immediate revelation, and by this means there was at that time a conjunction of the Lord with the human race. After their times, however, there was no such immediate revelation, but there was a mediate revelation by means of correspondences, inasmuch as all their Divine worship was maintained by correspondences, and for this reason the Churches of that time were called representative Churches. For it was then known what correspondence is and what representation is, and that all things on the earth correspond to spiritual things in heaven and in the Church, or what is the same, represent them. Therefore the natural things that constituted the externals of their worship served them as media for thinking spiritually, that is, thinking with the angels. When the knowledge of correspondences and representations had been blotted out of remembrance then the Word was written, in which all the words and their meanings are correspondences, and thus contain a spiritual or internal sense, in which are the angels. In consequence, when a man reads the Word and perceives it according to the sense of the letter or the external sense, the angels perceive it according to the internal or spiritual sense; for all the thought of angels is spiritual while the thought of man is natural. These two kinds of thought appear diverse; nevertheless they are one because they correspond. Thus it was that after man separated himself from heaven and severed the bond, the Lord provided a medium of conjunction of heaven with man by means of the Word.