12 And I turned myself to behold wisdom, and madness and folly; for what [can] the man [do] that cometh after the king? [even] that which hath been already done.
Ecclesiastes 2:12 Cross References - ERV
Ecclesiastes 1:9-10
Ecclesiastes 1:17
17 And I applied my heart to know wisdom, and to know madness and folly: I perceived that this also was a striving after wind.
Ecclesiastes 7:25
25 I turned about, and my heart [was set] to know and to search out, and to seek wisdom and the reason [of things], and to know that wickedness is folly, and that foolishness is madness: