17 And I (A)applied my heart to know wisdom and to know (B)madness and folly. I perceived that this also is but (C)a striving after wind.

18 For (D)in much wisdom is much vexation,
    and he who increases knowledge increases sorrow.

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17 Then I applied myself to the understanding of wisdom,(A) and also of madness and folly,(B) but I learned that this, too, is a chasing after the wind.

18 For with much wisdom comes much sorrow;(C)
    the more knowledge, the more grief.(D)

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