The labor of the foolish wearies every one of them, because he knows not how to go to the city.
All Commentaries on Ecclesiastes 10:15 Go To Ecclesiastes 10
John Cassian
AD 435
Thus, having turned aside from the royal path, they are unable to get to that metropolis to which our journeying must ever and unswervingly be directed. Ecclesiastes expressed this quite distinctly when he said, “The toil of fools afflicts those who do not know how to go to the city”—namely, to “that heavenly Jerusalem, which is the mother of us all.”