Ecclesiastes 1 13
And I applied myself by heart and mind to seek and search out by [human] wisdom all human activity under heaven. It is a miserable business which God has given to the sons of man with which to busy themselves.
Compare with other 3 random translations
LSV Ecclesiastes 1:13And I have given my heart to seek and to search out by wisdom concerning all that has been done under the heavens. It is a sad travail God has given to the sons of man to be humbled by it.
ERV Ecclesiastes 1:13I decided to study and to use my wisdom to learn about everything that is done in this life. I learned that it is a very hard thing that God has given us to do.
GW Ecclesiastes 1:13With all my heart I used wisdom to study and explore everything done under heaven. Mortals are weighed down with a terrible burden that God has placed on them.