Yom Kippur, the Jewish day of repentance, takes place Oct. 8-9 this year, right around the second anniversary of the #MeToo movement. If #MeToo began as a reckoning and is reshaping American politics, media and entertainment, perhaps Yom Kippur is an appropriate time for some reflection.

Most Jews sit solemnly in synagogue on Yom Kippur and recount their sins. #MeToo prompted conversations about crime, abuse and corruption, but sin itself hardly gets mentioned. Many Jews find “sin” too Christian, and non-Jews often think it...