It is not expected that you go through life without making mistakes, but you will not make a major mistake without first being warned by the promptings of the Spirit. This promise applies to all members of the Church.
Some will make critically serious mistakes, transgressing the laws of the gospel. Here it is time to remind you of the Atonement, repentance, and complete forgiveness to the point that you can become pure again. The Lord said, “Behold, he who has repented of his sins, the same is forgiven, and I, the Lord, remember them no more.”13
If the adversary should take you prisoner due to misconduct, I remind you that you hold the key that will unlock the prison door from the inside. You can be washed clean through the atoning sacrifice of the Savior Jesus Christ.
You may in time of trouble think that you are not worth saving because you have made mistakes, big or little, and you think you are now lost. That is never true! Only repentance can heal what hurts. But repentance can heal what hurts, no matter what it is.
October 2011 General Conference, Boyd K. Packer, Despite the opposition, trials, and temptations, you need not fail or fear