Ecclesiastes 5:20

5:20 For he does not think much about the fleeting days of his life

because God keeps him preoccupied with the joy he derives from his activity.

Ecclesiastes 7:16

7:16 So do not be excessively righteous or excessively wise;

otherwise you might be disappointed.

Ecclesiastes 10:3

10:3 Even when a fool walks along the road he lacks sense,

and shows everyone what a fool he is.