“They Were Filled with That Joy Which is Unspeakable and Full of Glory”

Joseph F. McConkie, Robert L. Millet
This is a gift of the spirit that comes front being pure and righteous and from “knowing the peaceable things of the kingdom” (D&C 36:2). Spiritual outpourings that come as one comes to know, understand, and experience the Atonement always include “unspeakable” joy (see Mosiah 4:20; Alma 19:14; Alma 28:8, 14; Alma 36:20; 3 Nephi 17:18).

Doctrinal Commentary on the Book of Mormon, Vol. 3