There are many kinds of two opposite meanings in this world.
Good and evil, mortal and immortal, infinite and limited, light and darkness, happiness and sadness, joy and agony...
How about place? If this world is defined as two places, what are they?
The Bible says that this earth is divided into two places;
One is the place we can be saved and the other is the place to make the people worship idols and and go to hell.
If we are not in the place we can be saved, we come to be in the place of destruction.

Revelation 18:4
Then I heard another voice from heaven say; "Come out of her, my people, so that you will not share in her sins,
so that you will not receive any of her plagues..."

"Her" refers to Babylon.

Revelation 18:2
With a mighty voice he shouted:
"Fallen! Fallen is Babylon the Great! She has become a home for demons and a haunt for every evil spirit,
and a haunt for every unclean and detestable bird..."

What is the place we must be to be saved?

Isaiah 33:20
Look upon Zion, the city of our festivals(God's appointed feasts);
your eyes will see Jerusalem( heavenly Mother-Gal.4:26)... There the Lord will be our Mighty One...
No one living in Zion will say "I am ill"; and the sins of those who dwell there will be forgiven.

It's Zion that we must stay till the end to be saved.
Zion is the Church of God keeping the feasts recorded in the Bible( the Sabbath, the Passover and so on..).