So I hated life, for the work which had been done under the sun caused me only great sorrow; because all is futility and chasing after the wind.

Two are better than one because they have a more satisfying return for their labor;

For he will not often consider the [troubled] days of his life, because God keeps him occupied and focused on the joy of his heart [and the tranquility of God indwells him].

Do not say, “Why were the old days better than these?”
For it is not from wisdom that you ask about this.

Because the sentence against an evil act is not executed quickly, the hearts of the sons of men are fully set to do evil.

But it will not be well for the evil man, nor will he lengthen his days like a shadow, because he does not fear God.

Then I commended pleasure and enjoyment, because a man [without God] has no better thing under the sun than to eat and to drink and to be merry, for this will stand by him in his toil through the days of his life which God has given him under the sun.

and I saw all the work of God, I concluded that man cannot discover the work that is done under the sun. Even though man may labor in seeking, he will not discover; and [more than that], though a wise man thinks and claims he knows, he will not be able to find it out.

The labor of a fool so wearies him [because he is ignorant] that he does not even know how to go to a city.

in the day when the keepers of the house (hands, arms) tremble, and the strong men (feet, knees) bow themselves, and the grinders (molar teeth) cease because they are few, and those (eyes) who look through the windows grow dim;

Furthermore, they are afraid of a high place and of dangers on the road; the almond tree (hair) blossoms [white], and the grasshopper (a little thing) is a burden, and the caperberry (desire, appetite) fails. For man goes to his eternal home and the mourners go about the streets and market places.

Furthermore, because the Preacher was wise, he still taught the people knowledge; and he pondered and searched out and arranged many proverbs.