Masters in criticizing and prejudicing the works of others, say those discourses are more profitable

You will find among those who are unable to create or say anything of value, but are past masters in criticizing and prejudicing the works of others, say those discourses are better and more profitable which denounce our present mistakes than those which praise our past deeds. Isocrates. Antidosis. Speech 15. Section 62. (Condensed)

Image: Marcus Portius Cato the Censor, a 3D-printable bust from CGTrader.