177. And no one is able to shut it, signifies that hell cannot prevail against it. For the Lord alone opens and shuts the doors to heaven, and the door, which He opens, is perpetually open to those who are in truths from good from the Lord, and perpetually shut to those who are in falsities from evil; and since the Lord alone opens and shuts, it follows that hell cannot prevail against them: more may be seen on this subject above (n. 174).