These two phrases mean basically the same thing and emphasize that God will avenge his people. AT: "I will certainly avenge you" (See: [[rc://en/ta/man/translate/figs-parallelism]])
Paul compares the punishment that the enemies will receive to hot coals being poured on their heads. Possible meanings are 1) "make the person who harmed you feel badly about how he has mistreated you" or 2) "give God a reason to judge your enemy more harshly." (See: [[rc://en/ta/man/translate/figs-metaphor]])
## Do not be overcome by evil, but overcome evil with good ##
Paul describes "evil" as though it is a living being. AT: "Do not let those who are evil defeat you, but defeat those who are evil by doing what is good" (See: [[rc://en/ta/man/translate/figs-personification]] and [[rc://en/ta/man/translate/figs-activepassive]])