giving vengeance to those who don't know God, and to those who don't obey the Gospel of our Lord Jesus,
Those who are lost in the final day of judgment will be lost for a variety of reasons. The list of specific sins named in the New Testament numbers well over one hundred. It could be possible that out of one hundred who are lost, there are one hundred different reasons; however, all could be classified as those who "know not God" and "obey not the gospel." The word "gospel" (uangelion) means "good tidings"--"the glad tidings of the kingdom of God soon to be set up, and subsequently also of Jesus, the Messiah, the founder of this kingdom"; "the glad tidings of salvation through Christ; the proclamation of the grace of God manifested and pledged in Christ; the gospel" (Thayer 257-1-2098).