When someone’s ¹  prosperity ²  increases, those who consume it also increase; so what does its owner ³  gain, except that he gets to see it with his eyes? ⁴ 

Then I considered ¹  all the skillful work ²  that is done: Surely it is nothing more than ³  competition ⁴  between one person and another. ⁵  This also is profitless – like ⁶  chasing the wind.