Ecclesiastes 1:17
And I will give my heart to know wisdom, and the knowledge of praise and understanding: I knew this also it is the striving of the spirit
Ecclesiastes 2:3
I examined in my heart to draw my flesh with wine, and my heart led in wisdom; and to lay hold upon folly till that I shall see what this good to the sons of man which they will do under the heavens the number of the days of their life.
Ecclesiastes 1:13-14
And I gave my heart to seek and to search out in wisdom concerning all which was done under the heavens: this evil business God gave to the sons of man to be occupied in it
Ecclesiastes 2:10-12
And all that mine eyes asked I kept not back from them, and I withheld not my heart from all gladness; for my heart rejoiced from all my labor: and this was my portion from all my labor.
Ecclesiastes 7:23-25
All this I proved by wisdom: I said I will be wise, and it was removed far off from me.
1 Thessalonians 5:21
Try all things; hold the good.