....also he hath set the world in their heart, so that no man can find out the work that God maketh from the beginning to the end. Eccl.3:11
"Two facts meet him antagonistic to one another: 
---the place that man 
occupies, 
---and the nature that man bears. 
This creature with eternity in 
his heart,.......A crowd of 
things, each well enough, but each having a time-and though they be beautiful in their time, yet fading.
....also he hath set the world in their heart.
The Hebrew for “world” (primarily, “the hidden”)
 is that which, in its adverbial or adjectival use, constantly appears 
in the English Version as “for ever,” “perpetual,” “everlasting,” 
“always,” “eternal,” and the like. 
No other meaning but that of a 
duration, the end or beginning of which is hidden from us, and which 
therefore is infinite, or, at least, indefinite, is ever connected with 
it in the Hebrew of the Old Testament, and this is its uniform sense in 
this book.
We must however translate, as the nearest equivalent, He hath set eternity (or, the everlasting) in their heart. 
---The thought expressed is not that of the hope of an immortality, but 
rather the sense of the Infinite which precedes it, and out of which at 
last it grows. 
Man has the sense of an order perfect in its beauty. 
He 
has also the sense of a purpose working through the ages from 
everlasting to everlasting, but “beginning” and “end” are alike hidden 
from him and he fails to grasp it. 
In modern language he sees not “the 
beginning and the end,” the whence and the whither, of his own being, or
 of that of the Cosmos."