Every right work - Rather, every success in work.
For this ... - i. e., “This successful work makes the worker an object of envy.” Some understand the meaning to be, “this work is the effect of the rivalry of man with his neighbor.”
Related Commentaries of Ecclesiastes 4:4
Ecclesiastes 4:4
4 Again, I considered all travail, and every right work, that for this a man is envied of his neighbour. This is also vanity and vexation of spirit.