“What's thought cannot be unthought.”
“[Philosophy] must set limits to what can be thought; and, in doing so, to what cannot be thought. It must set limits to what cannot be thought by working outwards through what can be thought.”
“He welcomed challenges; they kept him sharp, showed that he was approachable, and oftentimes made him explore avenues previously unthought-of.”
“A true symbol appears only when there is a need to express what thought cannot think or what is only divined or felt.”
“Words are made for a certain exactness of thought, as tears are for a certain degree of pain. What is least distinct cannot be named; what is clearest is unutterable.”
“Those who cannot tell what they desire or expect, still sigh and struggle with indefinite thoughts and vast wishes.”