Quotation for Sukkah 55:19

(5) When one contemplates the greatness of the Creator and His infinite might, who observes one's outer and inner life. When one fixes his mind on this great theme and considers what our sages report regarding the impressive and awesome presence of the pious sages in previous generations, for example "he (Rav Sheshes) gazed his eyes on him and the man (died and) became a pile of bones" (Berachos 28a), or as it was said of Yonatan ben Uziel: "when he would expound the torah, any bird that would fly over him was instantly burnt."