I have heard a few parents state that they don’t want to impose the gospel on their children but want them to make up their own minds about what they will believe and follow. They think that in this way they are allowing children to exercise their agency. What they forget is that the intelligent use of agency requires knowledge of the truth, of things as they really are (see D&C 93:24). Without that, young people can hardly be expected to understand and evaluate the alternatives that come before them. Parents should consider how the adversary approaches their children. He and his followers are not promoting objectivity but are vigorous, multimedia advocates of sin and selfishness.
Seeking to be neutral about the gospel is, in reality, to reject the existence of God and His authority. We must, rather, acknowledge Him and His omniscience if we want our children to see life’s choices clearly and be able to think for themselves. They should not have to learn by sad experience that “wickedness never was happiness” (Alma 41:10).
His last line is terrific. Parents owe it to their children to help keep them from learning by "sad experience that 'wickedness never was happiness'".