As Christiana and her children approach, a great dog begins barking from within the walls. The sudden noise startles the travelers. Fear grips their hearts, especially Mercy, who wonders whether she truly belongs among those who receive the King's favor. For a moment they hesitate. How often believers know that feeling. We hear Christ's invitation, yet we wonder whether it is really meant for us. We know our failures. We remember our sins. We fear that the door might be clos