Quote / Rom.13:10; 1Cor.3:11-15; Jer 32:35; Isa.66:16; Mark 9:49; Zeph.3:8; Mal.3:2; 1Cor.3:12-15

What is the purpose of fire?

The ‘fire’ that Scripture speaks of does not harm God’s redeemed (lsa.43:2; Rom.13:10;1Cor.3:11-15). Clement of Alexandria (c.150- c.215) puts it this way: ‘God does not punish, for punishment is retaliation for evil. Rather, He chastens – for the purpose of good.’
Jer 32:35 …caused their sons and daughters to pass through the fire…nor had it entered my mind that they should do this abomination.
By fire and the sword the Lord will judge all flesh (Isa.66:16). All people will be seasoned with fire (Mark 9:49).
Fire is used to try, refine, purify (lsa.1:25; 6:6, 7; Zeph.3:8, 9; Mal.3:2, 3; 1Cor.3:12-15; 1Pet.1:6, 7; 4:12).

Source: Anthony Johnson in The Larger Hope, quoting Clement of Alexandria