17 And I gave my heart to know wisdom, and to know madness and folly: I perceived that this also is vexation of spirit.

18 For in much wisdom is much grief: and he that increaseth knowledge increaseth sorrow.

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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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