“One who fails to observe mental and physical phenomena every time they arise cannot see them as merely mental and physical phenomena. Furthermore, one does not realize their causality, impermanence, unsatisfactoriness, notself, or their immediate disappearance upon arising and their continuous disappearance thereafter. Therefore, one mistakenly identifies these mental and physical phenomena with a personal entity, a person who is either born without any cause or created by a creator. One mistakes them for someone or something permanent and pleasant, everlasting, and unchanging.”

“The economic basis for the complete withering away of the state is such a high stage of development of communism at which the antithesis between mental and physical labour disappears, at which there consequently disappears one of the principal sources of modern social quality - a source, moreover, which cannot on any account be removed immediately by the mere conversion of the means of production into public property, by the mere expropriation of the capitalists.”

“There are no physical problems—only mental ones.”

“What makes old age hard to bear is not the failing of one's faculties, mental and physical, but the burden of one's memories.”

“Doubt about the fact that insight wholesomeness consists of simply observing the presently arising mental and physical phenomena is also skeptical doubt. This doubt is so subtle that it is rarely detected but is instead mistaken for investigation. This doubt masquerades as analytical knowledge. The commentary on Netti Yuttihāra explains as follows: "Doubt appears in the guise of investigation."”

“A person who does not read cannot think. He may have good mental processes, but he has nothing to think about. You can feel for people or natural phenomena and react to them, but they are not ideas. You cannot think about them.”

“Some pains are physical, and some pains are mental, but the one that's both is dental.”

“The world of experience, both physical and psychic, is entirely composed of elements - spatial, tactile, accoustical, thermal, etc. Combinations of these elements make up different "phenomena", both psychic and physical. If the law of causality, inferred for all these phenomena - i. e. for the world of elements connected by various relations - is applicable to "things in themselves" serving as an immediate link between "phenomena" and "things", it is clear that "phenomena" and "things in themselves" are of the same nature. "Things in themselves" would then represent a direct continuation of the world of empirical elements and in fact would be only combinations of elements.”

“One of the curious features of modern physics is that in spite of its overwhelming success in explaining a vast range of of physical phenomena from quark to quasar, it fails to give us a single metaphor for how the universe really works.”

“The first requisite for success is the ability to apply your physical and mental energies to one problem incessantly without growing weary.”