• Berakhot 32a records that Moshe's prayer at Sinai was only answered after he seized hold of the Throne of Glory — Ecclesiastes 2's exhaustive experiment in pleasure, wisdom, and achievement mirrors Solomon's comprehensive audit of the Sitra Achra's inventory of temptations; only a king with his resources could run such a full trial, and his conclusion — "all was vanity and a chasing after wind" — is the most expensive intelligence briefing in history.
• Shabbat 156b teaches that Torah study and charity cancel the decrees of fate — Ecclesiastes 2:13 "then I saw that wisdom excels folly as light excels darkness" is the post-experiment intelligence finding that refuses nihilism: the Sitra Achra's trap in Kohelet is to take his vanity declaration as endorsing equal-value of all choices, but the Talmud reads him as an operative who tested every option and concluded that wisdom, though not exempt from vanity, retains the field advantage of light-over-darkness.
• Avot 4:2 ("One mitzvah leads to another mitzvah, and one sin leads to another sin") maps onto Ecclesiastes 2's description of compounding acquisition: the more one acquires in the Sitra Achra's economy, the more one craves, a cascade that mirrors the sin-chain described in Avot — the vanity of accumulation is also the vanity of the sin-spiral.
• Sanhedrin 20b records that Solomon initially married Pharaoh's daughter on the night of the Temple's dedication — Ecclesiastes 2:4 "I made great works... planted vineyards" is the same Solomon who overextended his royal-spiritual authority, and the Talmud reads his vanity chapter as his retrospective audit of the exact over-extension the Sitra Achra engineered through his marriages to foreign women.
• Kiddushin 2b derives from Ecclesiastes 2:2 ("I said of laughter, it is madness; and of joy, what does it do?") the Torah's negative view of frivolous joy — the Talmudic warrior who reads Ecclesiastes 2 is inoculated against the Sitra Achra's entertainment-as-sedation protocol: the madness of laughter is the specific numbing agent that the Sitra Achra deploys to prevent the soul's sober assessment of its own condition.