Quotes: Philosophy
This selection gathers reflections that probe human condition, knowledge and power. Authors range from Nietzsche’s focus on strength and affirmation to Aristotle’s emphasis on practice and habit, and Camus’ treatment of meaning in struggle. Together they ask what it takes to live deliberately and to judge rightly.
The thread running through them is the tension between reason and lived experience, between social constraint and individual becoming. You will encounter voices attempting to understand rather than simply condemn, to make sense of suffering, habit and authority, and to test how thought shapes life.
13 quotes on this theme, each with its source and insight
The quotes
“Power tends to corrupt, and absolute power corrupts absolutely.”
Source: Acton–Creighton correspondence, letter to Mandell Creighton, 1887 · Check the source
Verified attributionWhat we know
- What is documented
- The maxim appears in Acton's 1887 letter to Bishop Mandell Creighton; scholars and archives identify that correspondence as the origin.
Acton warns that unchecked authority erodes moral judgment: as power grows absolute, it breeds impunity and weakens conscience. He penned this line in an 1887 letter to Bishop Mandell Creighton while arguing that historians must judge leaders by the same moral standards as anyone else.
“One is not born, but rather becomes, a woman.”
Source: The Second Sex (1949) · Check the source
Verified attributionWhat we know
- What is documented
- The sentence is securely attributed to Simone de Beauvoir and appears in The Second Sex (1949).
Beauvoir’s line asserts that ‘woman’ is shaped by history and society: bodies are lived within rules and expectations that create identity. It comes from The Second Sex (1949) and captures her critique of treating women’s roles as natural facts.
“I have striven not to laugh at human actions, not to weep at them, nor to hate them, but to understand them.”
Source: Tractatus politicus, Introduction (1677) · Check the source
Verified attributionWhat we know
- What is documented
- The Latin formula appears in the Introduction to Spinoza’s Tractatus politicus and is presented there as his method of study.
- What remains uncertain
- Attribution to Spinoza is secure, but the line is often loosely translated and sometimes misassigned to other works.
Spinoza states a research method: suspend mockery, lament and hatred, and seek causal explanation for human acts. Phrased in the Introduction to the Tractatus politicus, it reflects his rationalist, deterministic approach to the passions.
“What does not kill me makes me stronger.”
Source: Twilight of the Idols ("Maxims and Arrows", aphorism 8), 1889 · Check the source
Verified attributionWhat we know
- What is documented
- The sentence appears as aphorism 8 in the “Maxims and Arrows” section of Twilight of the Idols, published 1889.
Nietzsche frames hardship as a possible crucible: suffering can be raw material for greater independence, creativity, or self-mastery, but only when actively transformed. The line appears in Twilight of the Idols (1889) among short maxims that challenge easy comforts.
“We are what we repeatedly do. Excellence, then, is not an act, but a habit.”
Source: The Story of Philosophy, Will Durant (1926) · Check the source
Disputed attributionWhat we know
- What is documented
- The exact sentence is a modern paraphrase popularized by Will Durant; it encapsulates Aristotle's claim that moral virtue is formed by habituation.
- What remains uncertain
- Scholars note the wording is not a verbatim quotation from Aristotle and is commonly misattributed to him.
The core insight is that excellence is a lasting disposition formed by repeated practice rather than a single deed. The line speakers often cite compresses Aristotle's ethical claim about habit into a neat slogan, even though that exact wording is a modern paraphrase.
“Hell is other people.”
Source: No Exit, final exchange (1944) · Check the source
Verified attributionWhat we know
- What is documented
- The sentence appears in Sartre’s play No Exit and is spoken by the character Garcin in the play’s concluding lines.
Sartre’s line reframes hell as a human condition: being trapped under other people’s judgments so that you become an object for their gaze. It closes the play No Exit, where three dead characters are forced into mutual scrutiny. The point targets dependence on others’ evaluations, not company itself.
“Man is born free; and everywhere he is in chains.”
Source: The Social Contract, Book I, Chapter 1 (1762) · Check the source
Verified attributionWhat we know
- What is documented
- The sentence is the opening line of Book I, chapter 1 of The Social Contract; attribution to Jean‑Jacques Rousseau is well documented.
Rousseau's famous opening compresses his argument: humans are naturally free, yet social and political ties often reduce them to 'chains.' He's diagnosing illegitimate domination, not rejecting society outright, and then proposes a civic order where laws express the people's will.
“The heart has its reasons which reason does not know.”
Source: Pensées (posthumous fragments) · Check the source
Verified attributionWhat we know
- What is documented
- The line is a genuine fragment from Pascal's Pensées, preserved in posthumous compilations of his papers.
Pascal argues that some truths are grasped by an inward sense rather than by formal proof. In the religious context of his Pensées, the “heart” names an intuitive faculty that perceives God and faith where reason alone cannot fully demonstrate.
“It is not things that trouble us, but our judgments about things.”
Source: Enchiridion, 5 (c. early 2nd century AD) · Check the source
Verified attributionWhat we know
- What is documented
- The statement appears in Enchiridion 5, a handbook compiling Epictetus' teachings as recorded by his student Arrian.
Epictetus teaches that disturbance arises from how we appraise events, not from events themselves. This practical claim — central to the Enchiridion — hands you back control: change your judgments and you change your experience.
“I think, therefore I am.”
Source: Discourse on the Method ; Meditations on First Philosophy · Check the source
Verified attributionWhat we know
- What is documented
- Descartes is securely tied to the cogito; his writings present the argument in several formulations, Latin and vernacular.
- What remains uncertain
- The concise Latin tag functions as a canonical label; Descartes used varying phrasings such as “I am, I exist,” and the exact French wording is a later rendering.
The cogito isolates a minimal certainty: thinking proves the existence of a thinking self in that instant. Descartes used this to rebuild knowledge from a point immune to radical doubt, reshaping modern ideas about subjectivity and reason.
“As for me, all I know is that I know nothing.”
Source: Apology, 21d–22d (c. 399 BC) · Check the source
Disputed attributionWhat we know
- What is documented
- Scholarly evidence ties the idea to Plato’s Apology (especially around 21d–22d) where Socrates explains his relative ‘wisdom’ as awareness of ignorance.
- What remains uncertain
- The familiar modern wording is a later paraphrase; the exact phrase does not appear verbatim in Plato and its direct attribution is disputed.
This saying captures Socratic intellectual humility: true wisdom begins by recognizing what one does not know. The exact wording is a later condensation, but Plato’s Apology records Socrates’ claim that he’s wiser because he doesn’t pretend to know.
“One must imagine Sisyphus happy.”
Source: The Myth of Sisyphus, conclusion (1942) · Check the source
Verified attributionWhat we know
- What is documented
- The sentence closes The Myth of Sisyphus and is presented as the essay’s decisive final formulation; the essay was published in 1942.
- What remains uncertain
- Some commentators note a similar line was earlier attributed to Kuki Shūzō, but the famous formulation and its development belong to Camus.
Camus reframes punishment as a stance: Sisyphus isn’t happy because his task gains external meaning, but because lucid acceptance and defiant struggle turn the effort into dignity. The essay’s final line encapsulates Camus’s claim that revolt can produce a tragic, self-made happiness.
“The end justifies the means.”
Source: The Prince, 1513 · Check the source
Disputed attributionWhat we know
- What is documented
- Scholarly evidence shows the exact English/French formula is not found verbatim in Machiavelli’s texts; it functions as a later summary of themes from his works.
- What remains uncertain
- Attribution remains disputed: the phrase is a popular paraphrase and some sources suggest other early authors, so the precise origin is uncertain.
This line condenses a hard political question: can a worthy goal excuse dubious actions? The idea is linked to Niccolò Machiavelli’s political realism—he examined power and survival without grounding policy in moral ideals—but the exact wording is a later shorthand, not a verified line from his works.