6:12 For no one knows what is best for a person during his life –
during the few days of his fleeting life –
for they pass away like a shadow.
Nor can anyone tell him what the future will hold for him on earth.
8:17 then I discerned all that God has done:
No one really comprehends what happens on earth.
Despite all human efforts to discover it, no one can ever grasp it.
Even if a wise person claimed that he understood,
he would not really comprehend it.