Ecclesiastes 1:17
And I give my heart to know wisdom, and to know madness and folly: I have known that even this is vexation of spirit;
Ecclesiastes 2:3
I have sought in my heart to draw out with wine my appetite, (and my heart leading in wisdom), and to take hold on folly till that I see where is this -- the good to the sons of man of that which they do under the heavens, the number of the days of their lives.
Ecclesiastes 1:13-14
And I have given my heart to seek and to search out by wisdom concerning all that hath been done under the heavens. It is a sad travail God hath given to the sons of man to be humbled by it.
Ecclesiastes 2:10-12
And all that mine eyes asked I kept not back from them; I withheld not my heart from any joy, for my heart rejoiced because of all my labour, and this hath been my portion, from all my labour,
Ecclesiastes 7:23-25
All this I have tried by wisdom; I have said, 'I am wise,' and it is far from me.
1 Thessalonians 5:21
all things prove; that which is good hold fast;