ולא תחללו את שם קדשי ונקדשתי בתוך בני ישראל
What is the most egregious sin that one can transgress? Perhaps we should step back a little in order to clarify the meaning of “egregious.” Sin might be relative, but every sin is an infraction against Hashem. So, they are all bad! In the Talmud Yoma 86a, Chazal address this question. They posit that the nefariousness of a sin is based on the contingency of performing teshuvah, repentance. When one transgresses a prohibitive commandment and later repents, his teshuvah is in limbo until Yom Kippur, when the sanctity of the day atones for his sin. When one transgresses a sin…