The compact formulation summarizes James’s pragmatic account in which an idea’s truth is connected with processes of verification and validation rather than treated only as a static label.
Pragmatism, Lecture VI, “Pragmatism’s Conception of Truth”; Project Gutenberg #5116. Capitalization has been normalized from “Truth HAPPENS to an idea”; the surrounding passage explains verification and validation.
“To define is to limit.”
Definitions clarify ideas but can also narrow them, especially when a label is treated as the complete reality of a person or experience.
The Picture of Dorian Gray, 1891 edition, Chapter 17; Lord Henry answers the Duchess of Monmouth’s question “What are you?” with “To define is to limit.”
“The world is a perpetual caricature of itself.”
Social appearances repeatedly exaggerate or contradict reality, making ordinary life look like an ongoing parody of its own pretensions.
Soliloquies in England, “Dickens”; Santayana uses caricature to describe the gap between living reality and conventional masks.
“If the doors of perception were cleansed every thing would appear to man as it is, Infinite.”
Blake imagines habitual perception as a filter that narrows reality; cleansing it would reveal a less limited world.
The Marriage of Heaven and Hell, Plate 14; Blake’s prose-poetic argument about the limits and cleansing of perception.
“There is no pre-established harmony between the promotion of truth and the welfare of mankind.”
Nietzsche rejects the comforting assumption that discovering truth must always coincide with human comfort or advantage.
Human, All-Too-Human, Part I, aphorism 517, “A Fundamental Insight”; Helen Zimmern translation.
“The world is my idea.”
Schopenhauer opens his system by arguing that the experienced world is always presented in relation to a knowing subject, making perception and consciousness conditions of the world as it is known.
The World as Will and Idea, Vol. I, First Book, §1, Haldane and Kemp translation, Project Gutenberg #38427. “Idea” translates Vorstellung in this historical philosophical vocabulary and should not be read as the everyday sense of a passing thought.
“I neither know nor think that I know.”
Socrates locates a small advantage in recognizing the boundary of his own knowledge: uncertainty is intellectually healthier than possessing the same ignorance while mistaking it for wisdom.
Plato, Apology, Benjamin Jowett translation, Project Gutenberg #1656. Socrates says this after examining a politician whom others considered wise; the wording is dialogue speech attributed to Socrates within Plato’s work, not a claim that Socrates knew literally nothing.
