What does Isaiah 1:31 mean?
Isaiah is not impressed with the supposedly sacred oak trees used in pagan worship rituals to false gods. Those Israelites who demonstrated their unfaithfulness to God by participating in these rituals, which may have included sexual immorality, will be ashamed when the Lord's judgment falls and they are destroyed. (Isaiah 1:29).Isaiah has said they will become like a dried out oak or garden. Under these conditions the once strong become vulnerable match sticks just waiting for a spark. The Lord will provide the spark, consuming in fire all in Israel who have forsaken Him. This continues to use fire as a metaphor for God's judgment. Earlier verses used the imagery of refining silver (Isaiah 1:22, 25) which involved heat and burning, as well.