Ecclesiastes 1:17
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 2:3
I searched in my heart how to cheer my flesh with wine (my heart yet guiding [me] with wisdom), and how to lay hold on folly, till I might see what it was good for the sons of men that they should do under heaven all the days of th
Ecclesiastes 1:13-14
And I applied my heart to seek and to search out by wisdom concerning all that is done under heaven. It is a great tribulation that God has given to the sons of men to be exercised therewith.
Ecclesiastes 2:10-12
And whatever my eyes desired I kept not from them. I did not withhold my heart from any joy. For my heart rejoiced because of all my labor, and this was my portion from all my labor.
Ecclesiastes 7:23-25
All this I have proved in wisdom. I said, I will be wise, but it was far from me.
1 Thessalonians 5:21
but examine all things. Hold firm the good.