Place a period after what the Lord says - Harold B. Lee

"The trouble with us today, there are too many of us who put question marks instead of periods after what the Lord says. I want you to think about that. We shouldn’t be concerned about why he said something, or whether or not it can be made so. Just trust the Lord. We don’t try to find the answers or explanations. We shouldn’t try to spend time explaining what the Lord didn’t see fit to explain. We spend useless time.

If you would teach our people to put periods and not question marks after what the Lord has declared, we would say, “It is enough for me to know that is what the Lord said.”"

Harold B. Lee, Admonitions for the Priesthood of God, LDS General Conference, October 1972

https://www.churchofjesuschrist.org/study/general-conference/1972/10/admonitions-for-the-priesthood-of-god?lang=eng