Prayer to Mary, Help of Christians

Saint John Bosco wrote the following prayer (#379 in the Raccolta): Mary, powerful Virgin, Thou art the mighty and glorious protector of holy Church; thou art the marvelous help of Christians; thou art terrible as an army in battle array; thou alone hast destroyed every heresy in the whole world.  In the midst of our anguish, our struggles and our distress defend us from the power of the enemy and at he hour of our death receive our souls in paradise.  Amen.