Elder Dallas H. Oaks of the Quorum of the Twelve Apostles taught that, regardless of a person’s susceptibility or tendency, we have an obligation to exercise our agency to overcome our personal weaknesses:

“Perhaps these persons, as the saying goes, were ‘born that way.’ But what does that mean? Does it mean that persons with susceptibilities or strong tendencies have no choice, no free agency in these matters? Our doctrine teaches us otherwise. Regardless of a person’s susceptibility or tendency, his will is unfettered. His free agency is unqualified. It is his freedom that is impaired. . . . We are all responsible for the exercise of our free agency.

“. . . Most of us are born with thorns in the flesh, some more visible, some more serious than others. We all seem to have susceptibilities to one disorder or another, but whatever our susceptibilities, we have the will and the power to control our thoughts and our actions. This must be so. God has said that he holds us accountable for what we do and what we think, so our thoughts and actions must be controllable by our agency. Once we have reached the age or condition of accountability, the claim ‘I was born that way’ does not excuse actions or thoughts that fail to conform to the commandments of God. We need to learn how to live so that a weakness that is mortal will not prevent us from achieving the goal that is eternal.

“God has promised that he will consecrate our afflictions for our gain (see 2 Nephi 2:2). The efforts we expend in overcoming any inherited weakness build a spiritual strength that will serve us throughout eternity. Thus, when Paul prayed thrice that his ‘thorn in the flesh’ would depart from him, the Lord replied, ‘My grace is sufficient for thee: for my strength is made perfect in weakness.’ [2 Corinthians 12:9]” (“Free Agency and Freedom,” in Monte S. Nyman and Charles D. Tate Jr., ed., The Book of Mormon: Second Nephi, the Doctrinal Structure [1989], 13–14).

1 Nephi 2:11–15.

One reason Satan encourages murmuring is to prevent us from following living prophets, inspired leaders, and parents.

Elder H. Ross Workman of the Seventy explained that “murmuring consists of three steps, each leading to the next in a descending path to disobedience.”

First, when people murmur, they begin to question. They question “first in their own minds and then [plant] questions in the minds of others.”

Second, those who murmur begin to “rationalize and excuse themselves from doing what they [have] been instructed to do. . . . Thus, they [make] an excuse for disobedience.”

Their excuses lead to the third step: “Slothfulness in following the commandment.” “The Lord has spoken against this attitude in our day: ‘But he that doeth not anything until he is commanded, and receiveth a commandment with doubtful heart, and keepeth it with slothfulness, the same is damned’ (D&C 58:29). . . .

“I invite you to focus on the commandment from living prophets that bothers you the most. Do you question whether the commandment is applicable to you? Do you find ready excuses why you cannot now comply with the commandment? Do you feel frustrated or irritated with those who remind you of the commandment? Are you slothful in keeping it? Beware of the deception of the adversary. Beware of murmuring” (in Conference Report, Oct. 2001, 104–6; or  Ensign, Nov. 2001, 85–86.

Elder Richard G. Scott of the Quorum of the Twelve Apostles explained that God provides us with challenges that are designed to help us grow spiritually: “Just when all seems to be going right, challenges often come in multiple doses applied simultaneously. When those trials are not consequences of your disobedience, they are evidence that the Lord feels you are prepared to grow more (see Proverbs 3:11–12). He therefore gives you experiences that stimulate growth, understanding, and compassion which polish you for your everlasting benefit. To get you from where you are to where He wants you to be requires a lot of stretching, and that generally entails discomfort and pain” (in Conference Report, Oct. 1995, 18; or  Ensign, Nov. 1995, 16–17).