13 I applied my mind to study and to explore by wisdom all that is done under the heavens. What a heavy burden God has laid on mankind!

13 And I gave my heart to seek and search out by wisdom concerning all things that are done under heaven: this sore travail hath God given to the sons of man to be exercised therewith.

13 I devoted myself to search for understanding and to explore by wisdom everything being done under heaven. I soon discovered that God has dealt a tragic existence to the human race.

13 And I set my heart to seek and search out by wisdom concerning all that is done under heaven; this burdensome task God has given to the sons of man, by which they may be exercised.

13 I decided to use my wisdom to learn about everything that happens on earth. I learned that God has given us terrible things to face.

13 And I applied my heart to seek and to search out by wisdom concerning all that is done under heaven: it is a sore travail that God hath given to the sons of men to be exercised therewith.

13 And I applied my heart to seek and search out by wisdom concerning all that is done under the heavens: this grievous occupation hath God given to the children of men to weary themselves therewith.

13 With 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.

13 I applied my mind to seek and explore through wisdom all that is done under heaven. God has given people this miserable task to keep them occupied.

13 applied my mind to seek and to search out by wisdom all that is done under heaven; it is an unhappy business that God has given to human beings to be busy with.

13 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 to be busy with.

13 I spent all of my time studying. I used my wisdom to check everything out. I looked into everything that is done on earth. What a heavy load God has put on men!

13 And I set my mind to seek and explore by wisdom concerning all that has been done under heaven. It is a grievous task which God has given to the sons of men to be afflicted with.