The winnowing fork in Matt 3:11-12 refers to the separation of both the repentant and the unrepentant. In my study today, it occurred to me that the chaff thrown into the unquenchable fire is the unrepentant. The unquenchable fire is not temporary as by baptism, but a “fire” everlasting.
Those who repent and trust in him will receive the blessing of the Holy Spirit (Joel 2:28-29, Acts 2:16-21), while the unrepentant will receive the judgment of eternal fire, and even the repentant may undergo purifying fire.
“I baptize you with water for repentance, but he who is coming after me is mightier than I, whose sandals I am not worthy to carry. He (Jesus) will baptize you with the Holy Spirit and fire. His winnowing fork is in his hand, and he will clear his threshing floor and gather his wheat into the barn, but the chaff he will burn with unquenchable fire.” -Mt 3:11-12