Come, Listen to a Prophet's Voice

"In some priesthood blessings—like a patriarchal blessing—the words spoken are the essence of the blessing. But in a healing blessing it is the other parts of the blessing—the anointing, the sealing, faith, and the will of the Lord—that are the essential elements. ...The words spoken in a healing blessing can edify and energize the faith of those who hear them, but the effect of the blessing is dependent upon faith and the Lord’s will, not upon the words spoken by the elder who officiated."  Elder Dallin H. Oaks, Healing the Sick, April 2010