True believers are people who believe God. They, therefore, value what God says and stands for; keep His commandments (John 14:15; 1 John 2:3-6); and live a Godly life. Should not they, therefore, like Jesus, love those who hate them (Luke 6:27) and sacrifice their own interest in order to compensate for the offenses their offenders have caused them? God stayed faithful to His people although they abandoned Him and were unfaithful to Him. Should not true believers, therefore, always stay faithful to their spouse; even if their spouse has been unfaithful to them (Hosea 3:1)? In addition, because God is love, true believers will have an absolute trust, that through love all problems can be solved. Should not they, therefore, not resort to law suites (1 Corinthians 6:7), revenge (Romans 12:19) and war (Matthew 5:21-22; Matthew 26:52; Ephesians 2:14-16 & Zech 4:6)?
Good questions, but difficult to answer in that they’re pretty general.
Love those that hate them? Yep. Sacrifice own interests? Depends on what is meant.
Stay faithful to spouse? Yep. That’s the idea in the sacramental nature of marriage.
True believers have an absolute trust? Yep, that SHOULD be the case, but few have that level of faith. Look at Peter’s denials.
Lawsuits should be a last resort. Hypothetically, if some evil dude scams a “true believer” out of his life savings, should his family suffer poverty because “through love all problems can be solved”? Not that lawsuits are the instrument of love, but wanting civil justice is not inconsistant with love.
Same thing with criminals. Should one not file charges against a criminal for the sake of love?