Fire represents God as well as His angels (Acts 7:30, Nehemiah 9:12, Hebrews 1:7)

"For our God is a consuming fire." - Hebrews 12:29 KJV

Fire represents God’s acceptance of a sacrifice. (1Chronicles 21:26, 2Chronicles 7:1, 2Chronicles 7:1, 1Kings 18:22, 24, 38)

"And there appeared unto them cloven tongues like as of fire, and it sat upon each of them. And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance." - Acts 2:3-4 KJV

"Now when Solomon had made an end of praying, the fire came down from heaven, and consumed the burnt offering and the sacrifices; and the glory of the LORD filled the house." - 2 Chronicles 7:1 KJV

Fire is used to purify the pure and destroy the impure. (Malachi 3:2 KJV/NLT, Zechariah 13:9 KJV/NLT, Matthew 3:10, Luke 3:17, 1Corinthians 3:13, 15, Revelation 3:18 KJV/NLT, Revelation 15:2, 2Thessalonians 1:8, 2Peter 3:7, Jude 1:7, Jude 1:23, Revelation 20:9-10, 14-15)

"I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire:" - Matthew 3:11 KJV

"That the trial of your faith, being much more precious than of gold that perisheth, though it be tried with fire, might be found unto praise and honour and glory at the appearing of Jesus Christ:" - 1 Peter 1:7 KJV

"But he knoweth the way that I take: when he hath tried me, I shall come forth as gold." - Job 23:10 KJV

"For every one shall be salted with fire, and every sacrifice shall be salted with salt." - Mark 9:49 KJV "For everyone will be tested with fire." - Mark 9:49 NLT

"Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:" - 1 Peter 4:12 KJV

"Blessed is the man that endureth temptation: for when he is tried, he shall receive the crown of life, which the Lord hath promised to them that love him." - James 1:12 KJV

"But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men." - 2 Peter 3:7 KJV