The lake of fire is the final, eternal place of conscious punishment for the wicked — distinct from Hades (the intermediate state) and from the bottomless pit (the demonic prison). In Revelation 19:20, the beast and the false prophet are cast alive into the lake of fire at Christ's return. In 20:10, Satan joins them after the thousand-year millennium. In 20:14, "Death and Hades were cast into the lake of fire. This is the second death." And in 20:15, "anyone not found written in the Book of Life was cast into the lake of fire." The lake of fire is Gehenna — the Christ-named "hell" of Matthew and Mark — in its final, consummated form. It is eternal (Matthew 25:46), conscious (Revelation 14:11, 20:10), and just (Revelation 16:5-7). The existence of the lake of fire is not a stain on God's goodness but its vindication: it is where unrepentant evil finally meets the justice it has always deserved. The only way to escape it is the refuge God Himself has provided: His Son.