And whatsoever my eyes desired I kept not from them, I withheld not my heart from any joy; for my heart rejoiced in all my labor: and this was my reward of all my labor.
All Commentaries on Ecclesiastes 2:10 Go To Ecclesiastes 2
Didymus the Blind
AD 398
“Heart” does not here signify the organ but reason. In a different passage [we read]: “Blessed are the pure in heart.” This means with regard to reason. And: “Listen to me, you stubborn of heart.” The heart thus understood does not need to be “kept from pleasure.” It derives pleasure from appropriate views and meditations based on knowledge. By knowledge I mean knowledge that is in accordance with God.