Ecclesiastes 3:11

3:11 God has made everything fit beautifully in its appropriate time,

but he has also placed ignorance in the human heart

so that people cannot discover what God has ordained,

from the beginning to the end of their lives.

Ecclesiastes 7:14

7:14 In times of prosperity be joyful,

but in times of adversity consider this:

God has made one as well as the other,

so that no one can discover what the future holds.

Ecclesiastes 8:17

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.