"If we would be sober and watch in fasting and prayer, God would turn away sickness from our midst." (Joseph Smith, HC 6:2)
"The speaker, before closing, called upon the assembly before him to humble themselves in faith before God, and in mighty prayer and fasting to call upon the name of the Lord, until the elements were purified over our heads, and the earth sanctified under our feet, that the inhabitants of this city may escape the power of disease and pestilence, and the destroyer that rideth upon the face of the earth, and that the Holy Spirit of God may rest upon this vast multitude." (Joseph Smith, HC 4:32)
"Is any sick among you? let him call for the elders of the church; and let them pray over him, anointing him with oil in the name of the Lord: And the prayer of faith shall save the sick, and the Lord shall raise him up; and if he have committed sins, they shall be forgiven him. Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much." (James 5:14-16)
For those who have not faith:
"And whosoever among you are sick, and have not faith to be healed, but believe, shall be nourished with all tenderness, with herbs and mild food, and that not by the hand of an enemy. And the elders of the church, two or more, shall be called, and shall pray for and lay their hands upon them in my name; and if they die they shall die unto me, and if they live they shall live unto me." (D&C 42:43-44)
"When our friends are stricken down by sickness and disease, or when our little ones are in the agonies of pain and death, there should be Elders in our midst who have educated themselves so thoroughly in developing the gifts of the Spirit within them, and in whom the Saints have such perfect confidence, that they would always be sought after instead of doctors. There are men among us who possess the gift of healing, and might have great faith; but they do not exercise the gift, they do not live for it, and, therefore, do not have the power to use it so effectually as they might. There are men in this Church who are as good in their hearts and feelings as men ever were, but lack faith and energy, and do not obtain really what it is their privilege to receive. If their faith, their energy and determination were equal to their good feelings and desires, their honesty and goodness, they would indeed be mighty men in Israel; and sickness and disease and the power of the evil one would flee before them as chaff before the wind". (Discourse by Apostle Lorenzo Snow, delivered at Logan, Sunday, May 6th, 1882.)
If it's God's will that a person be healed, then someone with faith, should seek for someone with the gift to heal. Otherwise, if it isn't God's will, no skill of a doctor can change that, and if they could, isn't that the definition of evil?
"I preached to a large congregation at the stand, on the science and practice of medicine, desiring to persuade the Saints to trust in God when sick, and not in an arm of flesh, and live by faith and not by medicine, or poison; and when they were sick, and had called for the Elders to pray for them, and they were not healed, to use herbs and mild food." (HC 4:24, p 414)
Obtain power with God, or cease to administer the form without the power
"President Smith, while leading the way to my bed, made this remark: 'Brother Noble, you have been too long with me to lie here.' As soon as I saw him the tears of joy burst from my eyes. In a moment he was by my bedside, and took me by the hand. Without waiting for the other brethren to get to my bed, he commanded me, in the name of Jesus Christ, to arise and walk. I arose, and while putting on my clothes I fainted. When I regained consciousness I was on the bed, and Joseph was standing close to me.
"As soon as my eyes met his he said, 'Wherefore didst thou doubt?' and again commanded me to arise.
"While he was speaking I felt the healing virtue flowing through every part of my system. I immediately arose and walked, rejoicing and praising the Lord with all my heart, for His blessing resting upon me, by which I was made whole.
"Joseph, at this time, rebuked the Elders for administering the form without the power. Said he, 'Let the Elders either obtain the power of God to heal the sick, or let them cease to administer the form without the power.'" (Autobiography of Joseph Bates Noble)
"This desolating sickness is spreading steadily over the United States. The account of its ravages in many places, we cannot give. The whole number of cases in New York, to July 31st, is 3,731. Deaths, 1,520.
"No man can stop the work of the Lord, for God rules the pestilence, and the pestilence rules men. Forts, sentinels, and oceans may hinder men, or money may bribe, but when the pestilence rides on the wings of the wind, the sentinel has no power; the fort is no obstacle, the ocean is no barrier; and money has no value; the destroying angel goes waving the banner of death over all; and who shall escape his pointed arrow? Not he that could brave death at the cannon's mouth, but shrinks at the sound of the cholera; not he that worshiped his God in some stately chapel, every Sabbath till the cholera comes, and then flees for his life; no, none but he that trusts in God, shall be able to stand when a thousand shall fall at his side, and ten thousand at his right hand by the noisome pestilence." (Joseph Smith, HC v 1, ch 20, p. 282)
Amanda Smith heals her son's hip
"The entire hip joint of my wounded boy had been shot away. Flesh, hip bone, joint and all had been ploughed out from the muzzle of the gun, which the ruffian placed to the child's hip through the logs of the shop and deliberately fired. We laid little Alma on a bed in our tent and I examined the wound. It was a ghastly sight. I knew not what to do. It was night now. There were none left from that terrible scene, throughout that long, dark night, but about half a dozen bereaved and lamenting women, and the children. Eighteen or nineteen, all grown men excepting my murdered boy and another about the same age, were dead or dying; several more of the men were wounded, hiding away, whose groans through the night too well disclosed their hiding places, while the rest of the men had fled, at the moment of the massacre, to save their lives. The women were sobbing, in the greatest anguish of spirit; the children were crying loudly with fear and grief at the loss of fathers and brothers; the dogs howled over their dead masters and the cattle were terrified with the scent of the blood of the murdered. Yet was I there, all that long, dreadful night, with my dead and my wounded, and none but God as our physician and help. ‘Oh my Heavenly Father,’ I cried, ‘what shall I do? Thou seest my poor wounded boy and knowest my inexperience. Oh, Heavenly Father, direct me what to do!’
"And then I was directed as by a voice speaking to me. The ashes of our fire was still smouldering. We had been burning the bark of the shag-bark hickory. I was directed to take those ashes and make a lye and put a cloth saturated with it right into the wound. It hurt, but little Alma was too near dead to heed it much. Again and again I saturated the cloth and put it into the hole from which the hip joint had been ploughed, and each time mashed flesh and splinters of bone came away with the cloth; and the wound became as white as chicken's flesh.
"Having done as directed I again prayed to the Lord and was again instructed as distinctly as though a physician had been standing by speaking to me. Near by was a slippery-elm tree. From this I was told to make a slippery-elm poultice and fill the wound with it. My eldest boy was sent to get the slippery-elm from the roots, the poultice was made, and the wound, which took fully a quarter of a yard of linen to cover, so large was it, was properly dressed. It was then I found vent to my feelings in tears, and resigned myself to the anguish of the hour. And all that night we, a few poor, stricken women, were thus left there with our dead and wounded....
"The crawling of my boys under the bellows in the blacksmith's shop where the tragedy occurred, is an incident familiar to all our people. Alma's hip was shot away while thus hiding, Sardius was discovered after the massacre by the monsters who came in to dispoil the bodies. The eldest, Willard, was not discovered....
"But to return to Alma, and how the Lord helped me to save his life. I removed the wounded boy to a house, some distance off, the next day, and dressed his hip; the Lord directing me as before. I was reminded that in my husband's trunk there was a bottle of balsam. This I poured into the wound, greatly soothing Alma's pain. ‘Alma, my child,’ I said, ‘you believe that the Lord made your hip?’ ‘Yes, mother.’ ‘Well, the Lord can make something there in the place of your hip, don't you believe he can, Alma?’ ‘Do you think that the Lord can, mother?’ inquired the child, in his simplicity. ‘Yes, my son,’ I replied, ‘he has showed it all to me in a vision.’
"Then I laid him comfortably on his face and said: ‘Now you lay like that, and don't move, and the Lord will make you another hip.’ So Alma laid on his face for five weeks, until he was entirely recovered—a flexible gristle having grown in place of the missing joint and socket, which remains to this day a marvel to physicians. On the day that he walked again I was out of the house fetching a bucket of water, when I heard screams from the children. Running back, in affright, I entered, and there was Alma on the floor, dancing around, and the children screaming in astonishment and joy. It is now nearly forty years ago, but Alma has never been the least crippled during his life, and he has traveled quite a long period of the time as a missionary of the gospel and a living miracle of the power of God. (Amanda Smith, LDS Biographical Encyclopedia, Andrew Jenson, Vol. 2, p.792-796)
"And there were some who died with fevers, which at some seasons of the year were very frequent in the land—but not so much so with fevers, because of the excellent qualities of the many plants and roots which God had prepared to remove the cause of diseases, to which men were subject by the nature of the climate." (Alma 46:40)
"And by the river upon the bank thereof, on this side and on that side, shall grow all trees for meat, whose leaf shall not fade, neither shall the fruit thereof be consumed: it shall bring forth new fruit according to his months, because their waters they issued out of the sanctuary: and the fruit thereof shall be for meat, and the leaf thereof for medicine." (Ezekiel 47:12)
"Because we will not receive chastisement at the hand of the Prophet and Apostles, the Lord chastiseth us with sickness and death." (Joseph Smith, HC 4:28)
Apostle Willard Richards prophesied that the principles of herbology "would never die out or cease until it had revolutionized the earth." (Priddy Meeks Journal, p. 31)