Ecclesiastes 3:6

3:6 A time to search, and a time to give something up as lost;

a time to keep, and a time to throw away;

Ecclesiastes 3:15

3:15 Whatever exists now has already been, and whatever will be has already been;

for God will seek to do again what has occurred in the past.

Ecclesiastes 12:10

12:10 The Teacher sought to find delightful words,

and to write accurately truthful sayings.

Ecclesiastes 7:25

True Righteousness and Wisdom are Virtually Nonexistent

7:25 I tried to understand, examine, and comprehend

the role of wisdom in the scheme of things,

and to understand the stupidity of wickedness and the insanity of folly.

Ecclesiastes 7:28-29

7:28 What I have continually sought, I have not found;

I have found only one upright man among a thousand,

but I have not found one upright woman among all of them.

7:29 This alone have I discovered: God made humankind upright,

but they have sought many evil schemes.

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.