Boyd K. Packer
"A teacher must be wise also in the use of his own spiritual experiences. I have come to believe that deep spiritual experiences are given to individuals for the most part for their own instruction and edification, and they are not ordinarily to be talked about. I heard one member of the First Presidency say once, 'I do not tell all I know. I have not told my wife all I know. I have found that if I tell everything I know and explain every experience that I have had, the Lord will not trust me.'
"There is also a scripture that says: 'Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.' (Matthew 7:6.) Sacred personal experiences are to be related only on rare occasions.
"I made a rule for myself a number of years ago with reference to this subject. When someone relates a spiritual experience to me, personally or in a small, intimate group, I make it a rigid rule not to talk about it thereafter. I assume that it was told to me in a moment of trust and confidence, and therefore I never talk about it. If, however, on some future occasion I hear that individual talk about it in public in a large gathering, or where a number of people are present, then I know that it has been stated publicly and I can feel free under the right circumstances to relate it. But I know many, many sacred and important things that have been related to me by others that I will not discuss unless I am privileged to do so under the rule stated above. I know that others of the Brethren have the same feeling." (Teach Ye Diligently, p. 326)
Lorenzo Snow
"The Savior has commanded not to cast pearls before swine. I am sorry to say that this instruction is not always sufficiently regarded by those to whom our Lord has given, through the Everlasting Covenant, His pearls of wisdom, knowledge, and precious gifts. The consequence is, we lose blessings instead of retaining them-a decrease of the Holy Spirit follows, instead of an increase, and our minds become darkened.
"What I allude to is this: we too frequently engage in conversation concerning things of the kingdom of God, with persons of a wrong spirit; and feeling over anxious to make them see, understand, and acknowledge the light presented, we urge on, and persist in the conversation until we partake of the spirit of those with whom we are conversing. We ought to be particularly guarded against falling into errors of this kind." (The Teachings of Lorenzo Snow, p. 73)