Proverbs 26:20-21 KJB
In these verses, the word "fire" is used as symbolic of the destructive effects of sin and evil. In order for sin and evil to continue to be destructive, it must be continuously fed with sinful and evil acts. The Devil feeds this fire. The Devil plants spiritual death into the inner beings of all humans because all humans, except for infants who die before they can sin, possess a weak free will that causes them to sin. Genesis 2:17; Genesis 3:15; Matthew 15:13 (KJB). God creates all humans to be good and creative. Genesis 1:31; Genesis 1:26-27 (KJB). The Devil aims to cause spiritual death to so utterly corrupt the good and living natures of humans to the extent that they become totally evil. The Devil can then claim them for his own and torture them forever. The Devil believes that if he can completely destroy a part of God's creation, then he can weaken God to the point that he will finally be able to murder God. Isaiah 14:12-17; John 8:44 (KJB). The Devil revealed his plan in the book of Job when he told God that if He allowed everything that God had blessed Job with to be taken from him, then Job would "curse God, and die." Job 2:9 (KJB). The Devil meant that the good nature of Job would become so evil that he would become lost from God in eternal death. Job 1:11-12; Job 2:4-6 (KJB). God knew that the Devil really wanted to destroy Job's life. But God can never lose anything He has ever created, and His Love can never fail. Ecclesiastes 3:14; Psalm 111:7-8; Matthew 15:13; I Corinthians 13:8 (KJB). When God told the Devil that he could not take Job's life, God meant that the Devil would never be able to take the good life of Job or any other human.
God gives humans free will when He creates them. God already knew that free will can cause rebellion because Lucifer had chosen to rebel. Ezekiel 28:15 (KJB). Satan believed that God had made a mistake when He gave free will to Adam and Eve. Satan thought that he could use what he thought was a mistake to cause humans to sin to the extent that it would so weaken them that he could inject spiritual death into every one of them which would eventually cause them to become totally evil and lost from God's Love forever. God knew all that when He created Adam and Eve and all of humanity. But God has a plan to prove that His gift of free will was not a mistake because He is able to cause every human that He would ever create to choose of their own free will to return to the faith in Him that He creates them to possess. Romans 12:3; John 5:24; Revelation 5:11-14 (KJB). God has proven and will prove that His Love for humanity, and all humans love for Him, can only be true and genuine. God will prove that His gift of free will is stronger than any scheme of the Devil. I Corinthians 1:25 (KJB).
But before God could return all of humanity to faith in Him, He had to do something about the spiritual death that the Devil injects into every human who sins because humans happen to be far too weak to save themselves from its utter destruction. God's Love caused Him to come to earth and sacrifice Himself by taking the spiritual deaths of all mankind on Himself on a cruel cross and suffer it Himself so that He could rise from the dead with complete and absolute victory over the Devil and all evil. Christ turned eternal death into only a temporary death, and He also suffered all of the sins and evil that causes it in order to completely eradicate all evil from His creation. Revelation 1:17-18; Hebrews 2:9-18; I Timothy 4:10; II Timothy 1:10; I Corinthians 15:26; I John 3:8; I John 2:2; John 5:28-29; John 11:25-26 (KJB).
All humans saved by God's grace suffer only physical death because they go directly to Heaven when they die. All humans who die in their sins, God must send their dirty souls and spirits to one of the three regions of death. Revelation 20:13 (KJB). But all of these deaths are only temporary. Christ will visit all humans "on the earth, and under the earth," and He will cause them all to repent and return to faith in Him as their Savior of their own free will so that He can use His fiery wrath against evil to dissolve their beings to separate their repentant, good and living natures from their dead and evil natures so that He can save and recreate their living natures with everlasting life on His recreated earth, and He will cast their dead and evil natures into the eternal lake of fire. II Peter 3:9-13; Revelation 5:11-14; Revelation 20:5; Revelation 21:1-5; Revelation 22:11-12 (KJB).