Prophets may speak their own opinions at times. There have been times when even the President of the Church has not been moved upon by the Holy Ghost. There is, I suppose you'd say, a classic story of Brigham Young in the time when Johnston's army was on the move. The Saints were all inflamed, and President Young had his feelings whetted to fighting pitch. He stood up in the morning session of general conference and preached a sermon vibrant with defiance at the approaching army, declaring an intention to oppose them and drive them back. In the afternoon he rose and said that Brigham Young had been talking in the morning but the Lord was going to talk now. He then delivered an address the tempo of which was the exact opposite of the morning sermon.