Essay # 8 - The Sefira of "BINA " - Part 2

From Understanding the Sefiros: R Yossi Michalowicz by R Yossi Michalowicz.

The Connection of Bina  to 1) Mikveh; 2) Shabbos, and 3) Sense of Hearing. Why did Tzaddikim not speak mundane words on Shabbos ?