“There are two kinds of people. Avoid both.” Schopenhauer did not say this (but I kinda wish he had)
He did say: “The majority of men … are not capable of thinking, but only of believing, and … are not accessible to reason, but only to authority” (Parerga and Paralipomena, 1851) [Alternative translation here: “For the average man has no critical power of his own, and is absolutely incapable of appreciating the difficulty of […]