SLEEPING & SPEAKING ON SHABBOS

From B'yam Darkecha on the Beauty of Shabbos & the Yomim Tovim: R Yossi Michalowicz by R Yossi Michalowicz.

PP.416 - 426: 3 LEVELS OF SLEEP. THE HIGHEST LEVEL IS SLEEPING IN ORDER TO BECOME BATEIL TO HASHEM. YOUR SPEECH SHOULD BE AS IF YOU WERE SPEAKING IN FRONT OF THE KING.