Extremity of the heavens
The extremity of the heavens to the extremity thereof (Matthew 24:31), signifies the internal and external things of the church.
(Referencias: Arcana Coelestia 4060; Matthew 24)
Matthew 24:31
31
And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.