The assurance to us by the Lord that He is the "same yesterday, today and forever" appears often in scripture. (See, e.g., four times by Nephi including 1 Ne. 10: 18; 2 Ne. 2: 4; 2 Ne. 27: 23, and above; Alma 31: 17; Mormon 9: 9; Moroni 10: 19; D&C 20: 12; and D&C 35: 1, among other places.) Why do you suppose the Lord wants us to trust in this idea? What is it about the Lord's "sameness" that is important for us to understand?
Are the Lord's expectations different from one generation to the next? Are His teachings? Are His ordinances? Can we discard what He has given us and be justified? If His expectations are as unchanged as He is, then how important is it for us to study and retain all that He has given by revelation to mankind? How important is it to keep ordinances entirely intact?
If the Lord does not change, and the story of the Nephite people is a story of temporary success followed by ultimate failure, then how relevant is that account for us? Does temporary success in repentance guarantee constant favor from the Lord? When the Book of Mormon follows splinter groups in the narrative, because the splinters kept the commandments of God better, does that preserve a relevant lesson for those reading the book today? If so, how?
If the Lord "speaks forth [His] own words according to [His] own pleasure" then how can we control to whom and when He is permitted to speak? If He reserves to Himself this right, what effect does our system of recognizing an authoritative message from Him have upon His right to speak? Did the revelation given to Oliver Cowdrey that told him that he could not write commandments, but only according to wisdom, and never command Joseph Smith who presided over Oliver, establish a binding precedent on the Lord? (D&C 28: 4-6.) If so, what limit does that place on the Lord? Does the limitation on someone being sent forth as a missionary to preach the Gospel, and the requirement they be "regularly ordained by the heads of the church" limit the Lord's ability to speak His own words? (D&C 42: 11.) If so, in what way?
Does the revelation to Joseph Smith informing the Church in 1831 that no one other than Joseph Smith is to receive commandments and revelations for the Church limit the Lord's ability to speak to anyone else? (D&C 43: 1-6.) In particular, what of the Lord's counsel that this limitation was intended as "a law unto you, that ye receive not the teachings of any that shall come before you as revelations or commandments; And this I give unto you that you may not be deceived, that you may know they are not of me." (Id. verses 5-6.) Does that prevent Him from speaking "according to His own pleasure?"
What about the 1830 revelation given to Joseph Smith that no one other than Joseph Smith is to receive revelations and commandments in the church? (D&C 28: 2.) Does that limit the Lord's ability to speak according to His own pleasure?
Do the promises given to Joseph Smith apply directly and continually as the binding precedent and complete limitation on the Lord's capacity to speak to us? If so, then can He still speak to individual members of the church but without providing a "revelation and commandment" to the entire church? For example, do we expect only President Monson to receive revelation on the individual members of your own family? How is President Monson supposed to be doing that for the families of some 13 million church members? If that isn't possible, then what about the approximate 2,000 stakes? Do we expect only President Monson to receive revelation about each of these divisions? If the stake presidents have been delegated responsibility, then can the stake president receive all revelation for each family within the stake? Can the stake president alone receive revelation for the families of his stake?
If each person is intended to receive some revelation for themselves, is that an absolute bar to receiving revelation for another? If, for example, someone were not in your ward, not in your stake, not even living in your state, but asked you to give them a blessing because of illness or injury, are you entitled to receive revelation while giving the blessing? Even if you have no connection to this person by family or church calling? Should you proceed with the blessing? If so, would you expect the Lord to assist, give revelation, and even inspire a commandment to the person if it were appropriate?
How hard and fast are the rules we impose on the Lord? Does His statement that He alone will decide when and to whom He speaks according to "His own pleasure" need to be weighed as part of the equation? If He cannot speak to anyone other than Joseph Smith, then did Joseph's death prevent Him from speaking further? If He cannot speak to anyone other than Joseph's successors in the office of President of the High Priesthood, then what if the occupant of that office is ill, infirm, or disabled?
Would the "system" govern, or the Lord's "own pleasure" govern? If it is "His own pleasure" then how can we possibly know when He speaks? What about the Lord's house being a house of order? Once He has a church established, should we trust He will confine His efforts to that church alone?
I suppose all these questions are answered by the Lord adding to "His own pleasure" that "because that I have spoken one word ye need not suppose that I cannot speak another; for my work is not yet finished; neither shall it be until the end of man, neither from that time henceforth and forever."
In the final analysis, it is left to us to fast, pray, seek the guidance of the Spirit, and to find where the Lord's own pleasure in speaking is to be found. I do not expect someone other than the presiding authorities to conduct the affairs of the church. Nor would I expect anyone would organize a ward or stake other than someone having authority over that responsibility, regularly recognized by the church. I would not expect to either pay tithing to, nor be asked to pay tithing to, someone other than a Bishop in the church. But, just as Elder F. Enzio Busche encountered gifted sisters with the gift of prophecy and visions, I do not believe revelation is or can be confined to any single office, person, or group. (See F. Enzio Busche's book, Yearning for the Living God.) While serving in various church leadership positions, including as a General Authority, he encountered gifted women with spiritual capacities who astonished him. But, to his credit, he did not doubt them.
God speaks according to His own pleasure. He cautions you that just because He says one thing at one time, He is never limited in what He may say at another time; even if you think it contradicts His earlier statements. He is living and He has the final decision in what He says and to whom He speaks. We must not forget that principle. Even though we may not like the uncertainty this introduces to our trusted systems. He alone will remain in control.