Ecclesiastes 1:8 All things are wearisome; Man is not able to tell it. The eye is not satisfied with seeing, Nor is the ear filled with hearing.

Ecclesiastes 2:10 All that my eyes desired I did not refuse them. I did not withhold my heart from any pleasure, for my heart was pleased because of all my labor and this was my reward for all my labor.

Ecclesiastes 2:11 Thus I considered all my activities which my hands had done and the labor which I had exerted, and behold all was vanity and striving after wind and there was no profit under the sun.

Ecclesiastes 4:8 There was a certain man without a dependent, having neither a son nor a brother, yet there was no end to all his labor. Indeed, his eyes were not satisfied with riches and he never asked, "And for whom am I laboring and depriving myself of pleasure?" This too is vanity and it is a grievous task. (NASB ©1995)