Rabbi Shimon Bar Yochai

“ As a result of this reverence before his Master, he will merit to serve with joy the commandments of the Torah. Therefore, it is written, "What does Hashem your Elohim require of you, but to fear" (Devarim 10:12) .
"And rejoice with trembling," that man must not overly rejoice in this world, referring only to worldly matters, but one must rejoice in the matters of Torah and the performance of precepts. Then man will find himself able to perform Torah and precepts with happiness, as it is written, "Serve Hashem with gladness." ”

“ But Nadab and Abihu by themselves are each considered equal to the seventy members of the Sanhedrin who served before Moses. For this reason, their deaths atoned for Yisrael. Therefore, it is written, "But let your brethren, the whole house of Yisrael bewail the burning" (Vayikra 10:6) . Rabbi Shimon said: "Nadab the firstborn," meaning he is the one that all acclaim and praise are his. How much more so with Nadab and Abihu (together) , because these two have no equal among all Yisrael.
"And Hashem spoke to Moses after the death of the two sons of Aaron" (Vayikra 16:1) . ”

“ We are merchants, but twice weekly we leave our community to study Torah here because (in the settlement we are disturbed) by people and they do not allow us (to study Torah) . I replied to them: How fortunate is your lot.
Furthermore, they said: Every time that the righteous depart this world, there is likewise annulled from this world all the harsh decrees, and the death of the righteous brings forgiveness for the sins of the generation. Therefore, we read the portion dealing with the sons of Aaron on Yom Kippur (Day of Atonement) to bring forgiveness for the sins of Yisrael. ”