Ecclesiastes 9:13

This [illustration of] wisdom I have also seen under the sun, and great it was to me:

Ecclesiastes 6:1

There is an evil which I have seen under the sun, and it weighs heavily on men:

I have seen everything during my [fleeting] days of futility; there is a righteous man who perishes in [spite of] his righteousness, and there is a wicked man who lives a long life in [spite of] his wickedness.

Ecclesiastes 8:16

When I applied my mind to know wisdom and to see the activities [of mankind] that take place upon the earth—how some men seem to sleep neither day nor night—

Ecclesiastes 9:11

I again saw under the sun that the race is not to the swift and the battle is not to the strong, and neither is bread to the wise nor riches to those of intelligence and understanding nor favor to men of ability; but time and chance overtake them all.

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Ecclesiastes 9:13