177. 'And no one is able to shut it' signifies that hell does not prevail against them. For the Only Lord opens and shuts the doors to heaven, and the door that He opens is perpetually open to those who are in truths derived out of good from the Lord, and perpetually shut to those who are in untruths derived out of evil; and since the Only Lord opens and shuts, it follows that hell does not prevail against them. More may be seen above concerning these things (n. 174).