Regarding the difficult quote from Theophrastus that "The happy man cannot mount the scaffold to the wheel," I found this confession of a 19th century Parisian: "I demand to expiate it; — I accept the responsibility; — I wish to mount the scaffold." This indicates at least to me that 'mounting the scaffold' to be hanged connotes volition on the part of the condemned. Theophrastus might well be saying that it is impossible to willingly undergo torture, and Epicurus responds by saying that one mig…
"Ixion was expelled from Olympus and blasted with a thunderbolt. Zeus ordered Hermes to bind Ixion to a winged fiery wheel that was always spinning. Therefore, Ixion was bound to a burning solar wheel for all eternity, at first spinning across the heavens, but in later myth transferred to Tartarus. Only when Orpheus played his lyre during his trip to the Underworld to rescue Eurydice did it stop for a while."