See commentary for Enos 1:5.
Harold B. Lee
"Another way by which we receive revelation is the way that the Prophet Enos spoke of. After he'd gone up and received the great commission to carry on the work and to write the record, he pens this very significant statement in his record in the Book of Mormon. 'And while I was thus struggling in the spirit, the voice of the Lord came into my mind saying -- .' In other words, sometimes we hear the voice of the Lord coming into our minds and when it comes the impressions are just as strong as though he were talking as with a trumpet into our ear. Jeremiah says something like that in the first chapter of the Book of Jeremiah: 'Then the words of the Lord came unto me saying -- .' He was having the voice of the Lord into his mind, as Enos said. ln the story of the Book of Mormon we have Nephi upbraiding his brothers, calling them to repentance and in his statement to them he gives voice to the same thought when he says, 'And he hath spoken unto you in a still, small voice, but ye were past feeling, so that ye coud not feel his words.' Thus the Lord, by revelation, brings into our mind as though a voice were speaking. May I bear humble testimony, if I may be pardoned, to that fact? I was once in a situation where I needed help. The Lord knew I needed help and I was on an important mission. I was awakened in the hours of the morning as though someone had wakened me to straighten me out on something that I had planned to do in a contrary course, and there was clearly mapped out before me as I lay there that morning, just as surely as though someone had sat on the edge of my bed and told me what to do. Yes, the voice of the Lord comes into our minds and we are directed thereby. (Brigham Young University Speeches of the Year, October 15, 1952 as taken from Daniel Ludlow, A Companion to Your Study of the Book of Mormon, p.164)
Marion G. Romney
"Another manifestation of revelation is the unspoken word, a good illustration of which is given us by Enos. He says: 'while I was thus struggling in the spirit, behold, the voice of the Lord came into my mind again, saying…' (Enos 10.) Then he tells us what the voice of the Lord put in his mind. This is a very common means of revelation. It comes into one's mind in words and sentences. With this medium of revelation I am personally well acquainted." (Conference Report, Apr. 1964, p. 124)