Ecclesiastes 6:7 All the labor of man is for his mouth, and yet his soul is not satisfied. [8] For what more has the wise man than the fool? What does the poor man have, who knows how to walk before the living? [9] Better is the sight of the eyes than the wandering of desire. This is also vanity and grasping for the wind.
The NASB renders the Hebrew word “soul” for “appetite” for clarity. The literal translation is soul, however, but both could be applicable here. The labor of man is to sate his appetite, whatever that appetite is. We work to achieve what we desire, but when we achieve it gratification is fleeting, and the soul, or one’s appetite, is stricken with fresh desire, or a new pursuit.