Then I looked on all the works that my hands had made, and on the labor that I had expended on it: and, behold, all was vanity and like grasping the wind, and there was no profit under the sun.
All Commentaries on Ecclesiastes 2:11 Go To Ecclesiastes 2
Didymus the Blind
AD 398
A person who is enlightened by the “sun of righteousness” is not “under” it but “in” it. Thus it is said in the Gospel: “The righteous will shine like the sun in the kingdom of their Father,” not “under” the sun. If a person says about himself that he is a Christian and enlightened by the true light, by the “sun of righteousness,” and still concentrates his actions on earthly things and strives after them (and we all are for the most part like these people) this person is “under the sun.” If he is “under the sun” in this way, he has no gain. Even if he quotes much from Scripture but does not act accordingly, he has no gain.