v17 - "but not to a single one" pay back evil (wrong) for evil (wrong) (because, in the context from here to the end of this chapter, God will be our vindicator)

v18 - as much as is possible

v19 - when the integrity, honor of God is under attack, or when a brother is under persecution then speak up; if I am the one under attack then I must not respond but let God move in the situation

v20 - kill 'em with kindness

v21 - victimized or victor?

Ch 13
v1 every soul
higher powers

No power exists except by the authority/establishment of God