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. Ecclesiastes 4:4 (KJV)
‘… that for this man is envied,’ refers to at least two things: (1) relationship between men, i.e., under the sun, and (2) false motivation of work. (Seow, 179) All labour is vain because it is motived by a sense of gain that is grounded in envy. (Provan, 118)
Comments: Henry highlights two interesting consequences: (1) men have very little conscience, envy can very easily mangle relationships, example: Cain-Abel, Esau-Jacob, and Saul-David; (2) the virtuous have little comfort in this world, i.e., it is problematic when men seek comfort, recognition or praise from other men – such labour will always be vain.
References:
Henry, M. (1706). Commentary on the Whole Bible, Complete, Eccl. 4:4-6
Provan, I. (2001). Ecclesiastes/Song of Songs: The New Application Commentary, Zondervan
Seow, C.L. (1997). Ecclesiastes, Yale University Press