Thank you to all those who posted in support of Tznius being Halacha D’Oraisa. It is a Mitzvah, which must be kept. IY”H there should be more education in this area, so that women and girls will know what they are supposed to do and what they are not supposed to do.
As I quoted before from “Daughters of Dignity (subtitiled: Hashkafa and Halachic Guidelines in the Noble Mitzvah of Tznius), Third Edition,” authored by Mrs. Chana Toby Friedman (who is part of the “Kol Kevudah Movement,” an organization which promotes modesty awareness and education), and which has the Haskama of such Rabbonim as Rav Pinchas Scheinberg, Shlita; Rav Ovadia Yosef, Shlita; and the Belzer Rebbe, Shlita:
From the Introduction:
“Dear Jewish Daughters:
We are living in times of increased immodesty. Impure influences are threatening the sanctity of Jewish women and girls and of our entire people. The Jewish principle of modesty is under attack and in danger. . . When modesty is weakened, the Holy Shechinah disappears from Israel, Heaven forbid, as it is written:
‘ V’Lo Yay-roeh B’cha Ervas Davar V’Shav May-acharehcha. ‘
‘ In the event that Hashem will see immodesty amongst you, He will turn away from you. ‘
It is of supreme importance for us to be particularly meticulous regarding the observance of this Mitzvah. One must vigorously pay attention to its details, lest one violate the fundamental laws for which a woman – in but a brief moment – may cause others to commit thousands of sins, thereby destroying many generations.”
The Mitzvah of Tznius encompasses both the external (dressing properly and covering what should be covered) and the internal (modest speech and modest behavior).