Ecclesiastes 1:17
So {I dedicated myself} to learn about wisdom and [to] learn about delusion and folly. However, I discovered that this also [is] chasing wind.
Ecclesiastes 2:3
I also {explored} {the effects of indulging my flesh} with wine. My mind guiding me with wisdom, {I investigated} folly so that I might discover what [is] good under heaven for {humans} to do {during the days of their lives}.
Ecclesiastes 1:13-14
I applied my mind to seek and to search by wisdom all that is done under the heavens. It [is] a grievous task God has given to {humans}.
Ecclesiastes 2:10-12
I neither withheld anything from my eyes that they desired, nor did I deprive any pleasure from my heart. My heart rejoiced in all my toil, for this was my reward from all my toil.
Ecclesiastes 7:23-25
All this I have tested with wisdom. I said, "I will be wise!" but {it was beyond my grasp}.
1 Thessalonians 5:21
but examine all [things]; hold fast to [what is] good.