Critique of Pure Reason on The Republic: “The Platonic Republic has become proverbial as an example--and a striking one--of imaginary perfection, such as can exist only in the brain of the idle thinker; and Brucker ridicules the philosopher for maintaining that a prince can never govern well, unless he is participant in the ideas.”
Critique of Pure Reason on Phaedon: “He endeavoured to prove in his Phaedo, that the soul cannot be annihilated, by showing that a simple being cannot cease to exist.”