Alma 44:5

And now, Zerahemnah, I command you, in the name of that all-powerful God, who has strengthened our arms that we have gained power over you, by our faith, by our religion, and by our rites of worship, and by our church, and by the sacred support which we owe to our wives and our children, by that liberty which binds us to our lands and our country; yea, and also by the maintenance of the sacred word of God, to which we owe all our happiness; and by all that is most dear unto us.

Power is found in faith, in worship, in true religion, in faithful activity in church, in doing our duty towards our families, in support of righteous causes, and in the study of the scriptures. We don't need superheroes, we need super faith.

Jacob 1:19

And we did magnify our office unto the Lord, taking upon us the responsibility, answering the sins of the people upon our own heads if we did not teach them the word of God with all diligence; wherefore, by laboring with our might their blood might not come upon our garments; otherwise their blood would come upon our garments, and we would not be found spotless at the last day.

We each have a ministry to fulfill. We are responsible to teach others, and especially our children. If we do all we can, we will not be held accountable for the agency of others. If we do not make the effort, however, God will hold us culpable for our neglect of duty.  We will bear at least part of the guilt. Thankfully, the Atonement can overcome every sin and all guilt. We can repent, make amends, and be healed even of lost opportunities.