The Rosh Yeshiva explains why HaShem’s command to harass the Midyanim (Midianites) at the beginning of Parashas Pinchas is followed by instructions about vows in Parashas Mattos and related matters, from what Bilam (Balaam) was really trying to accomplish against the Jewish people, what the Jewish family is about and how religious Jewish families live, where the Shechinah dwells and from what comes wealth and happiness, to what is essentially the worst transgression a person can make to the related prohibition on making vows in general, when they are permitted, when and how they can be nullified.