J.R. Miller reflects on Holman Hunt's painting 'Light of the World,' which beautifully illustrates Christ's role as the Redeemer, adorned in a priestly robe and a crown of thorns, symbolizing His sacrifice. The painting depicts Jesus standing at the door, knocking with eager love, representing His desire to enter our lives and hearts. Miller emphasizes that the door can only be opened from within, highlighting the importance of our willingness to accept Christ's invitation. Despite the door remaining shut, Christ patiently continues to knock, embodying divine love and grace. The sermon challenges us to consider whether we have opened our hearts to Him.