In the Theological Work Conjugial Love, Swedenborg states:

“It has pleased the Lord to manifest Himself to me [Swedenborg] and to send me to teach the things which shall be of the New Church, meant by the New Jerusalem in the Apocalypse. To this end, He has opened the interiors of my mind and spirit, whereby it has been granted me to be in the spiritual world with angels and at the same time in the natural world with men(h), and this now for twenty-five years.”
(Conjugial Love 1)