The relationship of the next paragraph (12:49–53) to the preceding one may be the thought of judgment. The fire that Jesus wants to be “kindled” (12:49) is the fire of judgment that discriminates between the unrighteous and righteous. It probably does not refer to the Holy Spirit here (but cf. Luke 3:16). The purifying fire is also related to Jesus’s imminent baptism (12:50). The baptism that Jesus must undergo is not a literal baptism; rather, it is a metaphor of some overwhelming catastrophe—clearly his…
Baker Publishing Group, The Baker Illustrated Bible Commentary, by Gary M. Burge