Karl Graustein, Growing Up Christian, 2005, p. 182-183.
On unbelievers, He will pour our His wrath because of their unrepentant hearts. On behalf of believers, He has already punished Jesus for our sins. His holy character demands that He hate sin, judge sinners, and pour out His wrath on those who sin. When we realize how much God hates sin, we will grow in our hatred for it, too.
Karl Graustein, Growing Up Christian, 2005, p. 182-183.