Selection from Apocalypse Explained ~ Emanuel Swedenborg
All prophecies, like all things else in the Word, are written by correspondences, to the end that by means of these there may be conjunction of heaven with the church. Conjunction is effected by means of correspondences; for heaven, or the angels in heaven, understand spiritually all those things that man understands naturally, and between natural and spiritual things there is a perpetual correspondence, and by means of correspondences there is conjunction like that between soul and body. On this account the Word is written in the style that it is; otherwise there would be no soul within it, consequently no heaven within it; and if heaven were not in it, the Divine would not be in it. For this reason then it is said that from the internal or spiritual sense of all things in what is written to each church, it is made manifest what essential of the church is meant; thus that what is written to the angel of this church treats of those who are in faith alone, that is, in faith separate from charity. It is said faith separate from charity, by which is meant faith separate from the life, for charity is of the life. Consequently, when faith has been separated from the life, it is not in the man but outside of him; for whatever has place in the memory only, and is taken up from the memory into the thought, without entering into man's will and from the will into act, that is not within man but outside of him; for the memory, and thought therefrom, is only as a court, through which there is entrance into the house; the house is the will. Such is faith alone, or faith separate from charity.
(Apocalypse Explained 227)