Jamieson, Fausset and Brown on Ecclesiastes 7:28

28. Rather, referring to his past experience, "Which my soul sought further, but I found not."

one man--that is, worthy of the name, "man," "upright"; not more than one in a thousand of my courtiers (Job 33:23; Psa 12:1). Jesus Christ alone of men fully realizes the perfect ideal of "man." "Chiefest among ten thousand" (So 5:10). No perfect "woman" has ever existed, not even the Virgin Mary. Solomon, in the word "thousand," alludes to his three hundred wives and seven hundred concubines. Among these it was not likely that he should find the fidelity which one true wife pays to one husband. Connected with Ec 7:26, not an unqualified condemnation of the sex, as Pr 12:4; 31:10, &c., prove.