Hell is a topic that is spoken of often in the New Testament. One of the most memorable sermons Jesus delivered on the subject was the parable of Lazarous and the rich man (Luke 16:19-31). In this passage, Jesus communicates God’s justice and the permanent torment and separation from God that those in hell experience. Another famous passage is Mark 9:47-48 in which He says that it is better to get rid of something that causes us to sin than for our whole self to be thrown into hell (Mark 9:47-48). Some other passages in which Jesus references Hell are Matthew 3:12 and Matthew 25:41. However, Jesus did not only speak of Hell—He spoke on a variety of spiritual subjects—one of the most essential being salvation (John 3:16; John 14:6). We are called to proclaim both the seriousness of God’s judgment and the hope of eternal life through Christ.
The term "hellfire preaching" is often used to refer to preaching that focuses on describing the details regarding the pain and displeasures of hell as a method to motivate people to turn to faith in Christ and live a holy life. Hellfire preaching is often used in a negative sense in reference to preaching that is primarily negative and judgmental, rather than focusing on the love and grace of God.
Perhaps the period in which hellfire preaching was most common was in the Puritan era of America and England. The most well-known sermon of this type is "Sinners in the Hands of an Angry God" by Jonathan Edwards. It has been said that he described hell so vividly that hearers could smell the sulfur of hell burning.
Ministers should still preach on Hell today, but they should do so as Jesus did. Just as Jesus spoke of the reality and suffering of hell in combination with the love and grace of God, so today's ministers are called to proclaim the good news of Jesus as the solution to the eternal hell that awaits unbelievers.
Acts 20:20 offers the example of Paul telling the Ephesian elders, "I did not shrink from declaring to you anything that was profitable." In other words, he taught them the full counsel of God, not holding back the difficult aspects of Christianity. Today's ministers are called to likewise share both the grace of God and warn people of the judgment that awaits those who reject His message.