Years ago I did a youtube series on the secret history of Mormonism .
In it I showed how the revelatory sweet spot of Joseph Smiths Ministry took place in the early Kirtland years leading up to 1834. It was at that time that Joseph Smith received a revelation from the Lord declaring that the whole church including the leaders were under CONDEMNATION and needed to REPENT and REFORM in ALL THINGS.
“Verily, condemnation resteth upon you, who are appointed to lead my Chu[r]ch, and to be saviors of men: and also upon the church: And there must needs be a repentance and a refor[m]ation among you, in all things..” (Account of Meetings, Revelation, and Blessing, 5-6 December 1834 )
After that, revelation to the church through the prophet Joseph Smith greatly diminished and the heavens began to close until valid revelations from the Lord completely came to an end during the Nauvoo years prior to Joseph’s death.
The fellow that writes the Measuring Doctrine Blog has recently posted a remarkable, much more detailed analysis on this topic of diminishing revelation.
It can be found at the link below-
It is a very interesting read.