Some translations set each line of poetry farther to the right than the rest of the text to make it easier to read. The ULB does this with verses 2 and 16-18, which are words from the Old Testament.
Paul refers to Christians as servants of God. God calls Christians to serve him in all circumstances. Paul describes some of the difficult circumstances in which he and his companions served God.
Paul uses four pairs of contrasts: righteousness versus lawlessness, light versus darkness, Christ versus Satan, and the temple of God versus idols. These contrasts show a difference between Christians and non-Christians. (See: [[rc://en/tw/dict/bible/kt/righteous]] and [[rc://en/tw/dict/bible/other/light]] and [[rc://en/tw/dict/bible/other/darkness]])
The Bible often speaks of unrighteous people, people who do not do what pleases God, as if they were walking around in darkness. It speaks of light as if it were what enables those sinful people to become righteous, to understand what they are doing wrong and begin to obey God. (See: [[rc://en/tw/dict/bible/kt/righteous]])
Paul uses a series of rhetorical questions to teach his readers. All of these questions make essentially the same point: Christians should not intimately fellowship with those who live in sin. Paul repeats these questions for emphasis. (See: [[rc://en/ta/man/jit/figs-rquestion]] and [[rc://en/tw/dict/bible/kt/sin]])
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