1Co 3:12-13 Now if any man builds on the foundation with gold, silver, precious stones, wood, hay, straw, (13) each man's work will become evident; for the day will show it because it is to be revealed with fire, and the fire itself will test the quality of each man's work.
Mat 3:12 "His winnowing fork is in His hand, and He will thoroughly clear His threshing floor; and He will gather His wheat into the barn, but He will burn up the chaff with unquenchable fire."
Rev 1:14 His head and His hair were white like white wool, like snow; and His eyes were like a flame of fire.
Rev 2:18 "And to the angel of the church in Thyatira write: The Son of God, who has eyes like a flame of fire, and His feet are like burnished bronze, says this:
Rev 19:11-12 And I saw heaven opened, and behold, a white horse, and He who sat on it is called Faithful and True, and in righteousness He judges and wages war. (12) His eyes are a flame of fire, and on His head are many diadems; and He has a name written on Him which no one knows except Himself.
Heb 4:12-13 For the word of God is living and active and sharper than any two-edged sword, and piercing as far as the division of soul and spirit, of both joints and marrow, and able to judge the thoughts and intentions of the heart. (13) And there is no creature hidden from His sight, but all things are open and laid bare to the eyes of Him with whom we have to do.
1Co 6:3 Do you not know that we will judge angels?
Luk 8:17-18 "For nothing is hidden that will not become evident, nor anything secret that will not be known and come to light. "So take care how you listen; for whoever has, to him more shall be given; and whoever does not have, even what he thinks he has shall be taken away from him."
Mar 9:49-50 For every one shall be salted with fire, and every sacrifice shall be salted with salt. Salt is good: but if the salt have lost his saltness, wherewith will ye season it? Have salt in yourselves, and have peace one with another.
God is light and in him there is no darkness at all
God is love
Our God is a consuming fire
I think the Lake of Fire is a word/image for an experience that cannot yet be put into actual words. I think it is the suspending of the soul in the presence of God(tormented in the presence of God ad His holy messengers)until every hidden thing is brought to the light- anything not already under the blood. His eyes will search "the thoughts and the motives of the heart".
His eyes are as flames of fire. He makes His messengers flames. All things are open to the eyes of Him with whom we have to do.