"Even though they have taught their children all of the commandments and principles they need for righteous and provident living, parents are still susceptible to the serious error of failing to distinguish between mistakes and sins. If well-meaning parents call teenagers to repentance for teenagers' numerous mistakes, they may dilute the effect of chastisement and reduce the impact of repentance for the category of teenage sins that really require it...
"Sins result from willful disobedience of laws we have received by explicit teaching or by the Spirit of Christ, which teaches every man the general principles of right and wrong. For sins, the remedy is to chasten and encourage repentance.
"Mistakes result from ignorance of the laws of God or the workings of the universe or people he has created. For mistakes, the remedy is to correct the mistake, not to condemn the individual."
-Dallin H. Oaks, "Life's Lessons Learned"