Ecclesiastes 1:13
“And I gave my heart to seek and search out by wisdom concerning all things that are done under heaven: this sore travail hath God given to the sons of man to be exercised therewith.”
There is no remembrance of former things; neither shall there be any remembrance of things that are to come with those that shall come after.
I the Preacher was king over Israel in Jerusalem.
And I gave my heart to seek and search out by wisdom concerning all things that are done under heaven: this sore travail hath God given to the sons of man to be exercised therewith.
I have seen all the works that are done under the sun; and, behold, all is vanity and vexation of spirit.
That which is crooked cannot be made straight: and that which is wanting cannot be numbered.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“I have seen the travail, which God hath given to the sons of men to be exercised in it.”
“For what hath man of all his labour, and of the vexation of his heart, wherein he hath laboured under the sun?”
“What profit hath a man of all his labour which he taketh under the sun?”
“For all his days are sorrows, and his travail grief; yea, his heart taketh not rest in the night. This is also vanity.”
“Then I beheld all the work of God, that a man cannot find out the work that is done under the sun: because though a man labour to seek it out, yet he shall not find it; yea further; though a wise man think to know it, yet shall he not be able to find it.”