Yes, this is the conclusion of King Solomon.
Who is King Solomon? You ask.
He was the son of King David who took over the throne of Israel after David's death and is the king who built the First Temple in Jerusalem.
Long story about King Solomon.
But in a nutshell: he started out well in his relationship with God, but ended up -- alas, anything but well.
The Book of Ecclesiastes chronicles the downward spiral of his life as he turned away from God.
Interestingly, King Solomon's conclusion as recorded in Ecclesiastes 12:13 was:
"Let us hear the conclusion of the whole matter:
Fear Good and keep His commandments;
for this is the whole duty of man."
Fear Good and keep His commandments;
for this is the whole duty of man."
Solomon's downward spiral is not unique to him or his life; and it should serve as a warning to those who are following in the same path.
To read a very brief devotional which gives a few more details and insights into Solomon's conclusion, HERE'S THE LINK