Much labor wearies the body

and many thoughts oppress the mind:

Man aimes at profit by the one

And content in the other;

But often misses both,

And find nothing but vanity and vexation of spirit.

 

Ecclesiastes 2:11

Then I looked on all the works that my hands had wrought, and on the labour that I had laboured to do: and, behold, all was vanity and vexation of spirit, and there was no profit under the sun.