"And do not fear those who kill the body but cannot kill the soul. Rather fear him who can destroy both soul and body in hell." (Matthew 10:28 ESV).
"For if God did not spare angels when they sinned, but cast them into hell and committed them to chains of gloomy darkness to be kept until the judgment; if he did not spare the ancient world, but preserved Noah, a herald of righteousness, with seven others, when he brought a flood upon the world of the ungodly; if by turning the cities of Sodom and Gomorrah to ashes he condemned them to extinction, making them an example of what is going to happen to the ungodly; and if he rescued righteous Lot, greatly distressed by the sensual conduct of the wicked (for as that righteous man lived among them day after day, he was tormenting his righteous soul over their lawless deeds that he saw and heard); then the Lord knows how to rescue the godly from trials, and to keep the unrighteous under punishment until the day of judgment, and especially those who indulge in the lust of defiling passion and despise authority." (2 Peter 2:4-10 ESV).
Understanding hell is important, because it has to do with the righteous judgment of God, which is what makes salvation necessary. So it had significant meaning when Paul wrote: "among whom we all once lived in the passions of our flesh, carrying out the desires of the body and the mind, and were by nature children of wrath, like the rest of mankind. But God, being rich in mercy, because of the great love with which he loved us, even when we were dead in our trespasses, made us alive together with Christ—by grace you have been saved..." (Ephesians 2:3-5). Grace is amazing, because the justice of God is terrible. For all who have truly repented and have cast themselves completely on the mercy of God in Christ Jesus, the judgment and wrath they deserved has already been poured out upon the Lord on the cross.
"But as it is, he has appeared once for all at the end of the ages to put away sin by the sacrifice of himself. And just as it is appointed for man to die once, and after that comes judgment, so Christ, having been offered once to bear the sins of many, will appear a second time, not to deal with sin but to save those who are eagerly waiting for him." (Hebrews 9:26-28 ESV).
May our praise of God be a combination of both healthy fear and joy with thankfulness. And let all saints who fear Him continually praise the Lord for His steadfast love and grace!