Ecclesiastes 1:17
I gave my heart to know wisdom and to know madness and folly. I know that this also is a striving after wind.
Ecclesiastes 2:3
I searched in my mind how to stimulate my flesh with wine. My mind guided my heart with wisdom. I possessed foolishness until I could see what was good for the sons of men. I saw what they should do under the heavens all the days of their life.
Ecclesiastes 1:13-14
I devoted myself to study and explored wisdom concerning all that is done under the heavens. It is a grievous task God has given to the sons of men to be afflicted with.
Ecclesiastes 2:10-12
Whatever my eyes desired I did not keep from them. I did not withhold joy from my heart. My heart took pleasure in all my work and this was my reward.
Ecclesiastes 7:23-25
I have tried and proved all this by wisdom. I said: I will be wise but it was far from me.
1 Thessalonians 5:21
Prove all things; hold fast to what is good.