Commentaire sur L’Ecclésiaste 2:2

Of laughter I said it is senseless. Mixed with cries and sighs.⁴Alternatively, ‘מהולל’ means praiseworthy [=הלל], referring to the joy and delight awaiting the righteous in the World to Come, which is indeed praiseworthy. See Maseches Shabbos 30b.

“Of laughter, I said it is confounded; and of joy, what does it accomplish?” (Ecclesiastes 2:2).
“Of laughter, I said it is confounded” – Rabbi Abba bar Kahana said: How confounded is the laughter of the nations of the world in their circuses and theaters. “And of joy, what does it accomplish?” Why would a Torah scholar enter these [places]?
Another matter: How confounded is the laughter that the attribute of justice laughed at the generation of the flood; that is what is written: “Their houses are peaceful, without fear…” (Job 21:9). “Their descendants are well placed before them…” (Job 21:8). “His bull breeds and does not fail…” (Job 21:10). “They send out their young like a flock” (Job 21:11). “They sing to the timbrel and harp…” (Job 21:12). “They spend their days in prosperity” (Job 21:13). What is written there? “They said to God: Depart from us” (Job 21:14). Once they said: “What is the Almighty that we should serve Him?” (Job 21:15), the Holy One blessed be He said to them: “And of joy, what does it accomplish?” By your lives, I will obliterate you from the world. That is what is written: “He obliterated all existence” (Genesis 7:23).
Another matter: “Of laughter, I said it is confounded” – how confounded is the laughter that the attribute of justice laughed at the people of Sodom, as it is stated: “A land from which bread emerges…” (Job 28:5); “a place whose stones are sapphires…” (Job 28:6); “a path that birds of prey do not know…” (Job 28:7). When they said: We will do away with the policy of passersby from our midst,⁵They wanted to ensure that outsiders would not pass through their territory. that is what is written: “He breached a shaft from the residents, forgotten from all passersby” (Job 28:4). The Holy One blessed be He said to them: By your life, I will eliminate your memory from the world, as it is stated: “The Lord rained upon Sodom [and upon Gomorrah brimstone and fire]” (Genesis 19:24).

And of joy, what does it [accomplish]? [What] good is it if it ends in grief.