3:14 I also know that whatever God does will endure forever;
nothing can be added to it, and nothing taken away from it.
God has made it this way, so that men will fear him.
6:12 For no one knows what is best for a person during his life
during the few days of his fleeting life –
for
Nor can anyone tell him what the future will hold for him on earth.
11:6 Sow your seed in the morning,
and do not stop working
for you do not know which activity
whether this one or that one, or whether both will prosper equally.