Romans 9:27
And Isaiah declares about [the nation of] Israel [Isa. 10:22-23], "[Even] if the number of Israelites were [as many] as the grains of sand in the ocean, [still only] a small minority will be saved.
Romans 11:5-6
So, now also, there is a small minority which has been selected by God's unearned favor [i.e., to be saved].
Revelation 3:12
I will make the person who has victory [in the Christian life] a pillar in the Temple of my God [i.e., probably a reference to heaven], and he will never leave it. And I will write on him the name of my God, the name of the city of my God, the new Jerusalem which is coming down from heaven from my God [See 21:2, 10] and my own new name.