Ecclesiastes 2:14-16 concludes that the wise and fool both die and are forgotten — directly answering the question about advantage in 6:8.

Ecclesiastes 2:16 declares wise and fool alike die and are forgotten — directly answering the question of advantage.

Ecclesiastes 5:11 asks what advantage the owner has from increasing goods — a parallel to the question about advantage of wisdom in 6:8.

Ecclesiastes 2:22 asks what profit comes from toil — another rhetorical question about vanity, similar to the advantage question.

Romans 3:1 uses the same rhetorical structure: 'What advantage has the Jew?' — directly paralleling the questioning of advantage.

Proverbs 19:1 similarly values a poor person with integrity over a fool, echoing the question of the poor man's advantage.