When the Adoption Offer is Rejected

What does it mean to reject God's offer of adoption and reconciliation?

Scripture references---
Ezek. 33:11,, 2 Peter 3:8-9,, Mat. 10:28,, Mat. 13:41-50,, Mat. 25:41,46,, Mark 9:43,48,, 2 Thes. 1:8-9,, Jude 1:7,, Rev. 14:10-11,, Rev. 19:20,, Rev. 20:10-15,, Rev. 21:8

Further reading---
http://www.fether.net/index.php?ID=888
http://www.fether.net/index.php?ID=124
http://www.fether.net/index.php?ID=502
https://www.whatchristianswanttoknow.com/bible-verses-about-hell-21-eye-opening-scriptures/