“To guarantee yourself a lifetime of misery, be sure you marry someone with the intent of changing their behavior” — Charlie Munger
This lines up with what I learned in Psychology class; the best predictor of future behavior is NOT expressed intentions nor test results but past behavior. People don’t change much long term. Habits are habits for a reason–deep rooted—well protected—smooth talkers.
Psalms and Proverbs endlessly affirm the reality of good and evil people. Who is discerning enough to be a good judge of character? Then, who has the self control to act on it—walk away from worldly, dead-end, self-destructive relationships? (2 Cor 6.14-17; 1 Cor 15.33; Prov 13.20).