ur-a-jew wrote on 28 Jun 2011 16:56:
On a mystical level Korbonos also had certain kochos, but again for it to have those "mystical" powers you needed teshuva to accompany it. Otherwise you end up with
לָמָּה-לִּי רֹב-זִבְחֵיכֶם יֹאמַר ְה, שָׂבַעְתִּי עֹלוֹת אֵילִים וְחֵלֶב מְרִיאִים; וְדַם פָּרִים וּכְבָשִׂים וְעַתּוּדִים, לֹא חָפָצְתִּי
I would venture to sat that the same is true with Mikvah as well.
I just learned the Gemara (Chullin 5) That says we allow "Poshei Yisroel" the sinners of the Jews to bring karbanos (Nedarim & Nedavos) so that perhaps it will inspire them to do Teshuva. Perhaps Mikvah can accomplish a similar inspiration. I was more then a little dumbfounded to come across this Gemara immediately after having this whole discussion.