giving vengeance to those who don't know God, and to those who don't obey the Gospel of our Lord Jesus,
The scriptures give much proof that "fire" will be used in punishing the wicked at the final day (see Matthew 3:12; Matthew 25:41; Mark 9:43-48; 2 Peter 3:7; Revelation 20:15; Revelation 21:8). All fire will burn, but a flame is more active and penetrating, so the phrase flaming fire is used to indicate the intensity of punishment that is to be inflicted upon the wicked (154).