A Chanukah thought from my youth: I. The Puzzle The Midrash Rabbah on Bereishit comments on the word ' חשך ' (darkness): זה גלות יון, שהחשיכה עיניהם של ישראל בגזרותיהן, שהיתה אומרת להם, כתבו על קרן השור שאין לכם חלק באלהי ישראל "This is the Greek exile, which darkened the eyes of Israel with their decrees, commanding them: 'Write on the horn of the ox that you have no portion in the God of Israel.'" What does this cryptic decree mean? What is the קרן השור (horn of the ox), and what does it mean to have no חלק (portion) in the God of Israel? II. Chanukah and the Oral Law To understand this, we must first recognize what Chanukah represents in Jewish tradition. Chanukah is unique among Jewish holidays—it is the first holiday established not by divine commandment in the written Torah, but by rabbinic decree. It is the cornerstone of Torah she'ba'al peh , the Oral Law, and the authority of the Sages to interpret, expand, and apply Torah to new circumstanc...