2:19 Who knows if he will be a wise man or a fool?
Yet he will be master over all the fruit of my labor
for which I worked so wisely on earth!
This also is futile!
10:10 If an iron axhead is blunt and a workman does not sharpen its edge,
he must exert a great deal of effort;
so wisdom has the advantage of giving success.
11:3 If the clouds are full of rain, they will empty themselves on the earth,
and whether a tree falls to the south or to the north, the tree will lie wherever it falls.
11:8 So, if a man lives many years, let him rejoice in them all,
but let him remember that the days of darkness will be many – all that is about to come is obscure.