Musar על קהלת 1:7

If the Holy One Blessed is He says, “Leave him be,” that is fine. But if not, they will treat him as they did the first one. Along will come one who mastered Toras Kohanim and they will ask him, “Why did you not master all five books of the Torah?” For they contain the Shema and many other commandments, such as tefillin, mezuzah, etc. Along will come one who mastered all these and they will ask him, “Why did you not study and master the Aggadah? For when a Torah scholar sits and interprets (these texts), Hashem grants atonement for Israel’s sins. Moreover, when the listeners respond, Amein, yehei shemei rabba (at the end of the lesson in Aggadah), even if a decree has been written and sealed against them Hashem will forgive them and grant atonement for their sins.” Along will come one who mastered the Aggadah and the Holy One Blessed is He will ask him, “Why did you not master the Gemara, which is called the “Sea of the Talmud”? Concerning this was it written, “All streams flow to the sea but the sea is not full” (Koheles 1:7) — this alludes to Gemara.