Arcana Coelestia # 2589
2589. THE STATE AND CONDITION IN THE NEXT LIFE OF NATIONS AND PEOPLES BORN OUTSIDE THE CHURCH
It is commonly supposed that those born outside the Church, who are called heathens and gentiles, cannot be saved for the reason that they do not possess the Word and so do not know the Lord, without whom there is no salvation. But that gentiles too are saved may be known from the single consideration that the Lord's mercy is universal - that is, it reaches out to every individual human being. For gentiles are born human beings the same as those within the Church, who are a relative minority; and they are not to blame because they do not know the Lord. Consequently the nature of their state and condition in the next life has in the Lord's Divine mercy been shown to me.
Isaiah 19:18-21
18
In that day, there will be five cities in the land of Egypt that speak the language of Canaan, and swear to Yahweh of Armies. One will be called "The city of destruction."
19
In that day, there will be an altar to Yahweh in the midst of the land of Egypt, and a pillar to Yahweh at its border.
20
It will be for a sign and for a witness to Yahweh of Armies in the land of Egypt; for they will cry to Yahweh because of oppressors, and he will send them a savior and a defender, and he will deliver them.
21
Yahweh will be known to Egypt, and the Egyptians will know Yahweh in that day. Yes, they will worship with sacrifice and offering, and will vow a vow to Yahweh, and will perform it.