In response to your comment: "Religions are created by old men that want to get laid."

I would say;

When these kind and dear people formally called Mormons told me that Joseph Smith wished to end plural marriage and that God told him different, I thought it was possible.

When I researched my family on Familysearch.org I found handwritten accounts of the pain Joseph Smith and his family endured to continue plural marriage, written in that time period, I knew it was true. I could feel it in my spirit. I have no reason to not believe anything they have said to me, especially about the Holy Spirit.