Ecclesiastes 9:13
I have also seen this wisdom under the sun, and it was great to me:

Ecclesiastes 6:1
There is another evil I have seen under the sun, and it weighs heavily upon mankind:

Ecclesiastes 7:15
In my futile life I have seen both of these: A righteous man perishing in his righteousness, and a wicked man living long in his wickedness.

Ecclesiastes 8:16
When I applied my mind to know wisdom and to observe the activity that one does on the earth--though his eyes do not see sleep day or night--