Parshas Naso: What can we learn from the nazir?

Rebbi Simeon ben Laqish provided an opening: If you had known that one who makes a vow is as if he put a neck-iron on his neck, would you have made the vow? It is as if a gang of prisoners was passing by, he saw that there was one unused neck-iron and put his head into it! “To bind a prohibition onto himself”, as you say, “he was bound with chains.” Rebbi Jonathan provided an opening: If you had known that one who makes a vow is like one who builds an idolatrous altar and one who continues in it is like one who sacrifices there, would you have made the vow? That is difficult to understand. Idolatry is a capital crime but vows are a simple prohibition; how can you say that? You have only what Rebbi Yannai said, one who listens to his urges is as if he worshipped idols. Rebbi Isaac provided an opening: If you had known that one who makes a vow is like one who takes a sword and sticks it in his heart, would you have made the vow? “Some talk bluntly like sword piercings.” Rebbi Ḥanina from Sepphoris in the name of Rebbi Phineas: It does not say “piercing” but “sword piercings”. For example, one who made a vow not to eat a loaf. Woe if he eats, woe if he does not eat. If he eats he transgresses his vow. If he does not eat he sins against himself. What can he do? He goes to a Sage who will dissolve his vow, “but the speech of Sages is healing. Rebbi Eudaimon in the name of Rebbi Isaac: Is it not enough what the Torah forbade you that you want to forbid other things for yourself? “To forbid a prohibition”.