Augustine of Hippo

Now, to be made a sharer at the table is to begin to have life, as we see from a text in Ecclesiastes: "There is no good for a man except what he shall eat and drink." How can we reasonably interpret these words save as an allusion to partaking at the table which the Mediator of the New Testament, priest according to the order of Melchizedek, provides with his own body and blood? This sacrifice, indeed, has taken the place of all the sacrifices of the Old Testament that foreshadowed it.

City of God 17.20 ↗

Jerome

"So I praised enjoyment, for man has no other aim under the sun but to eat, drink, and be joyful; and this will accompany him in his toil during the days of his life which God has given him beneath the sun. "I have interpreted this more fully above, and now I shall just speak cursorily. …

Commentary on Ecclesiastes ↗

Bonaventure

Here fourthly, from this, pleasure is commended in detestation of so great a vanity, from the fact that good things befall the wicked and evil things befall the good; and this is the praise and word of a troubled man. Therefore he says: I praised therefore gladness, namely of the flesh, as though this alone were good; therefore he says: That there is no good for man under the sun except to eat and to drink, according to that passage in Isaiah 22: "Behold, joy and gladness, slaying rams, eating flesh and drinking wine," as though …

Commentary on Ecclesiastes, Chapter 8 ↗