Ecclesiastes 3:12

I know that there is no good in them,.... In these things; as the Arabic version; in the creatures, as Jarchi; in all sublunary enjoyments; in everything the wise man had made a trial of before, as…

In them - i. e., in the sons of men. To do good - In a moral sense. Physical enjoyment is referred to in Ecc 3:13.

We have seen what changes there are in the world, and must not expect to find the world more sure to us than it has been to others. Now here Solomon shows the hand of God in all those changes; it is…

for a man to rejoice, and to do good There is no instance in O. T. language of the phrase "do good" being used, like the Greek εὖ πράττειν, in the sense of "prospering," or "enjoying one's self," and…