All this have I seen (Ecclesiastes 5:18; Ecclesiastes 7:23); i.e. all that has been mentioned in the preceding eight verses, especially the conviction of retributive justice. He gained this experience by giving his mind to the consideration of men's actions.
There is a time wherein one man ruleth over another to his own hurt. This version is certainly incorrect. A new sentence is not commenced here, but the clause is closely connected with what precedes; and "his own hurt" should he "his [equivocally] hurt."
Thus Wright and Volck: "All this have I seen, even by applying my heart to all the work that is done under the sun, at a time when man ruleth over man to his hurt." Most modern commentators consider that the hurt is that of the oppressed subject; but it is possible that the sense is intentionally ambiguous, and the injury may be that which the despot inflicts, and that which he has to suffer.
Both these have been signified above. There is no valid reason for making, as Cox does, this last clause commence Ecclesiastes 8:10, and rendering, "But there is a time when a man ruleth over men to their hurt."