The Nazir isn't a person who is just restricted. He is a super-holy person, and his special restrictions (i.e., Tumas Meis, cutting hair, and drinking wine - eating grape-vine products) are just the after-effect of being such a holy, special person; similar to the restrictions of a Cohen. (Teshuvos Maharit). We find a: זֵר ז ה ב ס בִיב golden crown by three Kelim of the Bais Hamikdash: 1. the Mizbeach HaPenimi (this crown represents the Keser Kehuna). 2. the Shulchan (Keser Malchus). And 3. the Aron (Keser Torah). They all have a crown (זֵר). But the Nazir’s very name is a crown, and he has an extra Nun, Nazir.
If a person wants to remove himself from Ta'avos Olam HaZeh and avoid a Sotah situation, it is extremely difficult, since human nature is loaded with Treife lusts and desires. The only way out is when you lift yourself into a different mode, like learning Torah about which it says: וּמְגַּדַּלְתוֹ וּמְרוֹמַּמְתוֹ עַּל כ ל הַּמַּעֲשִ ים אבות ו א it lifts him higher than all other things. You're too big and too high for lowly garbage.
The Nazir is flying high and sees himself too big to fall into: הַּב לִים וּשְ טוּתִ ים empty foolishness. His very name is a crown, and while the three Kelim of the Mishkan have crowns, his is one big Nazir with a Nun added to his: זֵר “crown” name. Mr. Crown! You already feel different when they call you a General, or a: שַּ ר prince, or a: מוֹשֵ ל ruler, or Melech etc. How did Yosef overcome his Yetzer Hara? By saying: אֵינֶּנוּ ג דוֹל בַּבַּיִת הַּזֶּה מִמֶּנִי וישב לט ט I am the greatest person around here. The more you blow yourself up that you're top-top, the easier it is to overcome your passions.
Build Yourself Up - And Belittle Your Yetzer Hara
Notice how the Rambam spells: הִ לְ כוֹת שוֹט ה Hilchos Sotah with a: שִ ין (שוֹט ה not סוֹט ה) which is similar to: שוֹט ה a fool. Not only do you have to build yourself up, but you also have to play down your foolish Yetzer Hara as being stupidity! Sometimes lots of daily brain chatter telling you "I'm way above those stupid low life’s" and similar thoughts, will in time cause major results. "Who wants to get involved in such ridiculous wicked sins!"
The best way to overcome your Yetzer Hara is to “crown” yourself, and say (like Yosef) אֵ ינֶנּוּ גָדוֹל בַּ בַּ יִת הַּ זֶה מִ מֶ נִּ י “I’m Gevaldig, and I can’t lower myself to sin”
