Spared Again

How do we see that not all those who are of Israel are Israel? Why did David spare Saul a second time? Why didn’t any of those who slept awake when David spoke? Does God ordain some as vessels of wrath? Why do people hate the Sovereign God? What does God do to harden men’s hearts? Do those in hell gnash their teeth in repentance or anger against God? Will any have a good excuse for not repenting? What is the long-suffering of God toward rebellious sinners? Is God ever surprised?