All the rivers flow into the sea,
Yet the sea is not full.
To the place where the rivers flow,
There they flow again.

I spoke with my heart, saying, “Behold, I have acquired great [human] wisdom and experience, more than all who were over Jerusalem before me; and my mind has observed a wealth of [moral] wisdom and [scientific] knowledge.”

for the miscarriage comes in futility (in vain) and passes into obscurity; and its name is covered in obscurity.

I turned around and directed my heart to know, to investigate and to seek [skillful and godly] wisdom and the reason for things, and to know that wickedness is folly and that foolishness is madness [leading to stupidity and recklessness].

He who digs a pit [for others] may fall into it, and a serpent may bite him who breaks through a [stone] wall.

Rejoice, young man, in your childhood, and let your heart be pleasant in the days of your young manhood. And walk in the ways of your heart and in the desires of your eyes, but know that God will bring you into judgment for all these things.

For God will bring every act to judgment, every hidden and secret thing, whether it is good or evil.