3 “Listen: I will send my messenger before me to prepare the way. And then the One you are looking for will come suddenly to his Temple—the Messenger of God’s promises, to bring you great joy. Yes, he is surely coming,” says the Lord Almighty. 2 “But who can live when he appears? Who can endure his coming? For he is like a blazing fire refining precious metal, and he can bleach the dirtiest garments! 3 Like a refiner of silver he will sit and closely watch as the dross is burned away. He will purify the Levites, the ministers of God, refining them like gold or silver, so that they will do their work for God with pure hearts.
Hi, the topic you are referring to means the Second Coming of Christ where Judgment Day is the theme that is introduced as the End of the World. As the Bible relays the Kingdom of the Heavens will be God's means to provide salvation to all the world and the preaching Jesus Christ did that introduces the kingdom as mankind only solution to resolve sin and death forever, Romans 6:23. The messenger of the New Covenant to provide salvation is in the past Jesus Christ and his preaching, Luke 22:28-30. And the Second Coming that will in modern times establishes the kingdom of the heavens as God plan for salvation to all the earth, Daniel 2:44-45.