Practical guide
Fate, Chance and Our Own Agency in Epicurus’s Letter to Menoeceus
Epicurus distinguishes necessity, chance and our own agency, then separates wisely judged action from a merely fortunate result. Read those claims in the letter before bringing in later discussions of the atomic swerve. An unpredictable event alone does not explain a person’s reasons or control.
Locate the threefold claim near the letter’s end
Near the end of the Letter to Menoeceus, Epicurus rejects treating destiny as sovereign over everything and distinguishes things that happen through necessity, chance and our own agency. The displayed translation says: “some things happen of necessity, others by chance, others through our own agency.” [1]
He then connects praise and blame with our actions, describes fortune as inconstant, and prefers the misfortune of a wise person to the prosperity of a fool. These are related statements about agency, judgment and outcomes. Read them as a sequence before importing a modern theory into the word “free.”
The Stanford discussion identifies LM 134 when explaining Epicurus’s opposition to complete predetermination. It also discusses evidence about a swerve in atomic motion, chiefly from later sources, with uncertainty about its relation to voluntary action. [2] The distinction between the letter and that later evidence matters.
State what each term is doing in this passage
On a narrow screen, scroll inside the table or focus it and use the arrow keys.
| Term | Role in the passage | Do not infer from this alone |
|---|---|---|
| Necessity | Epicurus resists making it sovereign over all actions and connects necessity with a threat to responsibility. | That every event with an earlier cause is an ineffective action. |
| Chance or fortune | It is inconstant, rather than a divine guarantee of a happy life. | That an unpredictable outcome is itself a reasoned choice. |
| Our own agency | The letter connects our actions with praise and blame. | A complete modern account of which control conditions establish freedom. |
Epicurus’s assertion about necessity is his position in the passage. It is not an uncontested resolution of the later debate over causal determinism and responsibility. A reader can state that position clearly without pretending that the letter supplies every argument required to defend it.
For general definitions, use the existing determinism and fatalism guide. It already explains why being caused does not mean having no effects and why accounts of fate differ. This reading concentrates on what Epicurus actually says and the limits of the inference from those words.
Separate a considered action from a lucky result
The wise-misfortune comparison separates how an action was judged from whether fortune made its result successful. A favorable outcome can occur without sound consideration; an unfavorable outcome can occur despite it. The letter favors wisely judged action over prosperity belonging to a fool. [1]
Consider this invented teaching situation. Two reading groups need a quiet room. The exercise stipulates that reservations are required, Group A checks availability and makes the appropriate reservation, and an unforeseen building closure then prevents its meeting. Group B ignores the stated requirement but happens to find an unclaimed room elsewhere. Those facts are fictional; no institution or real event is being reported.
On a narrow screen, scroll inside the table or focus it and use the arrow keys.
| Group | Judgment under the stated circumstances | Outcome supplied by the exercise | What the outcome does not prove |
|---|---|---|---|
| A | Checks the relevant requirement and reserves an available room. | An explicitly unforeseen closure spoils the meeting. | Failure alone does not prove that the earlier reservation was badly judged. |
| B | Ignores a requirement it had reason to check. | A fortunate coincidence provides another room. | Success alone does not establish that ignoring the requirement was sound judgment. |
This illustrates the distinction; it does not prove that Group A’s every decision was perfect or that Group B could never have a good reason to change plans. The assessment uses the expressly supplied circumstances. Additional evidence could change it.
Why fortune does not become a substitute for agency
In the letter’s explanation, chance can supply starting points for great good or evil but is not a god that distributes a happy life. That keeps the character of an action and its assessment from being reduced to a fortunate arrival of circumstances. [1]
Distinguish taking a chance from a chance occurrence. A person can decide to enter an uncertain situation; the uncertainty does not explain the decision’s reasons. Conversely, an event can surprise someone without being an action they chose. Calling both “chance” would obscure the very distinction the passage asks us to preserve.
The earlier statement that the future is neither wholly ours nor wholly outside our power also warns against certainty and despair. Read it as part of the letter’s practical orientation toward what is to come. It does not specify a probability distribution or a formula for the proportion of the future someone controls.
Keep the later atomic discussion in its evidential place
SEP reports the Epicurean atomic swerve and notes that its evidence comes chiefly from later sources such as Lucretius and Cicero. It describes several interpretive difficulties, including how the swerve might relate to voluntary action and whether its purpose was to make room for action outside strict predetermination. [2]
The letter’s threefold statement does not itself describe the mechanics of that swerve. Treating the short passage as a detailed physical demonstration would therefore import evidence it does not contain. The original works discussed by SEP were not read for this guide; the account of those issues is explicitly secondary-source context.
Even a nondetermined event is not automatically a reasoned exercise of agency just because it is nondetermined. One would still need to explain the person’s role and control. The free-will comparison introduces that wider problem. It should be distinguished from the narrower task of interpreting Epicurus’s own words.
No claim about present-day quantum physics, neuroscience or an experimental proof of freedom follows from this reading. The unresolved historical and philosophical questions remain questions, rather than being converted into a scientific result.
Test three inference and attribution cases
These fictional cases separate text, judgment and outcome. Answer from the supplied premises.
Case 1
Group B gets a room by the lucky coincidence in the exercise. A reader concludes that ignoring the stated reservation requirement must have been wisely judged. What is missing?
Show answer and explanation for case 1
A fortunate result has been substituted for a reason to judge the action sound.
The exercise explicitly separates the group’s unconsidered action from the coincidence that helped afterward. A better assessment would inspect the information, requirement and reasons available when it acted. Success alone does not supply those reasons.
Case 2
A sentence about necessity, chance and agency is quoted from the letter. A footnote then calls it “Epicurus’s complete explanation of atomic-swerve mechanics.” Does the quoted sentence establish that claim?
Show answer and explanation for case 2
No. The quote does not describe those mechanics.
The letter supplies the threefold practical distinction. SEP discusses swerve evidence chiefly from later sources and records uncertainty about its role. The footnote would need actual additional evidence and a qualified argument; neither can be replaced by this sentence.
Case 3
A person hears an unexpected noise and says: “It was not predicted, therefore it proves I freely chose it.” Which inference fails?
Show answer and explanation for case 3
Unexpected occurrence has been confused with the person’s agency.
Lack of a prediction does not by itself establish indeterminism, and even an undetermined event is not automatically a reasoned action. The reader needs an account of what the person did, why and with what control. The event’s surprising character supplies none of that on its own.
Leave with a three-part reading note
Record the author’s claim, the inference you are drawing and the evidence still required. For example: “The letter distinguishes necessity, chance and our own agency and attaches praise and blame to action. It also separates wise judgment from lucky prosperity. A complete explanation of freedom or the swerve requires more than those assertions.”
Continue to pleasure and choice for another comparison that depends on circumstances and consequences. The desire classification asks which need or expectation is being pursued.
Sources and further reading
- Epicurus: Letter to Menoeceus — Hicks translation, MIT Internet Classics ArchiveIntact primary passages on choosing pleasures and pains, future uncertainty, necessity, fortune and our own agency. Visibly damaged transcription sentences are not quoted or silently reconstructed.
- Stanford Encyclopedia of Philosophy: Epicurus — Psychology and EthicsComplete section consulted for pleasure, choice, LM references and the qualified account of later atomic-swerve evidence; no underlying original works or complete entry claimed read.
- Stanford Encyclopedia of Philosophy: Epicurus — SourcesThe letters’ transmission and limits of attributing later Epicurean evidence directly to the founder.