Many today recognize that Luke follows the Isaianic new exodus for his Luke-Acts narrative. So, what it is the meaning of Jesus' baptism in Spirit/fire (Luke 3:16; Acts 1:8) in the light of this? (perhaps from Isaiah 59:16-21; Isaiah 61:1-3)?
In Acts 1, after Jesus presents himself to his disciples for 40 days, speaking of the kingdom, He uses the contrast between John's baptism and the baptism in the Holy Spirit. It causes the question about the restoration of the kingdom and Jesus replies that it is not for them to understand (another contrast), "but you shall receive power when the Holy Spirit has come upon you; and you shall be My witness both in Jerusalem and in all Judea and Samaria, and even to the remotest part of the earth."
Jesus inserts himself as the mediator of the new covenant of the Spirit. Could this be the fulfillment and paraphrase of "the redeemer will come to Zion...and this is my covenant with them - I will put my Spirit upon you and my words in your mouth...forever" (Isaiah 59:21-22)?
In verses 15b through 18 of Isaiah 59 there is a reference to judgement. Perhaps this was alluded to in "baptism of fire" fulfilled immediately against the power brokers of Jerusalem and later in final judgement. I am working on this.
Just thought I would expand so as to not leave the question hanging. I will try to write my questions better in the future.
Thank you for your patience.