175 years ago today - May 1, 1842

Joseph Smith preaches a sermon in which he teaches that there are "certain signs and words by which false spirits and personages may be detected from true, which cannot be revealed to the Elders till the Temple is completed . . . The Elders must know them all to be endowed with power . . . There are signs in heaven, earth and hell; the Elders must know them all, to be endowed with power, to finish their work and prevent imposition. The devil knows many signs, but does not know the sign of the Son of Man, or Jesus. No one can truly say he knows God until he has handled something, and this can only be in the Holiest of Holies."