The sentence closes a passage in King’s sermon “Three Dimensions of a Complete Life,” printed in his 1963 collection Strength to Love (Harper & Row, New York). Quote Investigator ↗ located it there and verified it on paper — the sermon starting at page 67, the quotation at page 72. What is not right is the source line the internet attaches to it: this is not from the 1957 sermon “Conquering Self-Centeredness.”
“Life's most persistent and urgent question is, 'What are you doing for others?'” Martin Luther King Jr., "Three Dimensions of a Complete Life," in Strength to Love (New York: Harper & Row, 1963), p. 72. Not in the King Institute's transcript of the 1957 sermon "Conquering Self-Centeredness," to which it is usually credited. Via Quotle.info
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Evoking the world of Martin Luther King Jr. — Baptist minister and leader of the American civil rights movement. Theme: "Life's most persistent and urgent question is, 'What are you doing for others?'". Atmospheric and restrained, cinematic directional light, a muted period-appropriate palette, fine grain and texture. Compose with generous empty space for the quote and a small credit line. No lettering in the image itself.
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Provenance
Where it actually appears
Author
Martin Luther King Jr.
Source
Strength to Love
Sermon
“Three Dimensions of a Complete Life”
Published
1963 · Harper & Row, New York (146 pp.) · quotation at page 72
Light has come into the world, and every man must decide whether he will walk in the light of creative altruism or the darkness of destructive selfishness. This is the judgment. Life’s most persistent and urgent question is, ‘What are you doing for others?’
Strength to Love, 1963
The passage as printed in Strength to Love and reproduced by Quote Investigator ↗, which cites the sermon at start page 67 and the quotation at page 72.
Quote Investigator ↗ concludes the quotation appeared in a collection of sermons and essays authored by King in 1963, citing Strength to Love, sermon “Three Dimensions of a Complete Life,” start page 67, quote page 72, Harper & Row, New York — and marks that citation “Verified on paper.”
Stanford’s Online King Records Access record ↗ for Strength to Love lists it as a 146-page book published New York: Harper & Row, 1963, and names “Three Dimensions of a Complete Life” among its contents.
The King Institute’s full transcript of “Conquering Self-Centeredness” ↗ — Dexter Avenue Baptist Church, 11 August 1957, taken from an audio recording of the service — contains no such sentence, though that sermon is the source most often named for it.
Quote Investigator’s chronology continues past the book: the same sermon and passage were reprinted in A Martin Luther King Treasury (1964), and The Ottawa Journal of 31 December 1968 described an Anglican primate’s Christmas card carrying the quotation credited to King — both documented on the QI page ↗.
Strength to Love is actively licensed, not free to reprint. Stanford’s King Institute states plainly that it cannot give permission to reproduce King’s writings and directs every request to Intellectual Properties Management, “the exclusive licensor of the Estate of Martin Luther King, Jr., Inc.” ↗ — which is the evidence the book is still in copyright. The 1963 date alone would not settle it: for US works first published before 1964 the term ran only if it was renewed in the 28th year. Quoting the sentence for attribution and commentary is ordinary fair use; reprinting the sermon is not.
Rights status is our research, not legal advice — and copyright varies by country and edition. For commercial or published use, confirm with the rightsholder. See terms.
Fact-check
The author is right. The citation usually isn’t.
This is one of the rare cases where a famous name attached to a feel-good line is actually correct — and the error has migrated into the footnote instead. Almost every version you will meet online pins the sentence to a sermon that does not contain it.
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Source and date“Conquering Self-Centeredness,” Dexter Avenue Baptist Church, 11 August 1957 Wrong sermon
This is the citation attached to the quotation almost everywhere. The King Institute publishes the complete text of that sermon ↗, transcribed from an audio recording of the service, and neither “persistent and urgent” nor “doing for others” appears anywhere in it. The sermon genuinely is about self-centredness and service — which is presumably why the pairing felt right to whoever first made it.
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Reference worksWikiquote’s 1957 grouping Filed under the wrong year
Wikiquote does carry the sentence, but reading the page carefully matters: it sits under the heading “Conquering Self-centeredness (1957) ↗” as a listed variant, sourced not to the sermon but to The Words of Martin Luther King, Jr. by Coretta Scott King, Second Edition (2011), chapter “Community of Man,” p. 3. That variant bullet is a visible blend — a loose rewording of the 1957 sermon’s opening spliced onto the “creative altruism … destructive selfishness” passage that belongs to the 1963 book — and our sentence is its closing clause, not a separate quotation from the sermon. That splice is how the wrong year travels.
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SourcingQuote-aggregator sites No source at all
BrainyQuote ↗ and PassItOn ↗ both print the wording exactly and both give no speech, book or date whatsoever — only King’s name. A sentence circulating without a citation is a sentence that will eventually acquire one, correctly or not.
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OvercorrectionThe “cannot be authenticated” verdict Superseded
In January 2015 the Jim Crow Museum at Ferris State University published the result of a genuine hunt for the source: “the most common attribution is to Dr. King’s 1957 speech, Conquering Self-Centeredness. But the quote is not there … this quote cannot be authenticated as being attributed to Dr. King” (Question of the Month, January 2015 ↗). That was the right call on the evidence then to hand, and the museum explicitly allowed that a record might yet surface. One did.
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Spoken versionsThe sermons King preached on this theme Observation
✓It really is King. Quote Investigator ↗ found the exact wording on the printed page — Strength to Love, Harper & Row, 1963, in the sermon “Three Dimensions of a Complete Life,” page 72. Cite the book, not the 1957 sermon.
Context
A sermon that only became this sentence in print
Strength to Love was assembled under difficult conditions. The King Institute records that King proposed a sermon collection to Harper in early 1957 but had produced nothing by mid-1962; he finally drafted several of the sermons during fifteen days in an Albany, Georgia jail cell in July 1962 ↗, and finished the volume while preparing for the Birmingham campaign in early 1963.
Editing changed the book. The King Institute notes that editors Melvin Arnold and Charles Wallis struck a good deal of King’s sharper language — his description of segregation as one of “the ugly practices of our nation,” his call for “a deep-seated change” in capitalism, much of his anti-war writing. What survived was the preaching a white readership could receive, and it made Strength to Love the first volume of sermons by an African American preacher widely available to that audience. This sentence is a product of that printed, edited form rather than of any one Sunday morning.
a sermon is not an essay to be read but a discourse to be heard
King’s own misgivings about sermons on the page
King was uneasy about the translation from pulpit to page. In the book’s preface he wrote that his reservations had “grown out of the fact that a sermon is not an essay to be read but a discourse to be heard,” and conceded as the book went to press that he had “not altogether overcome my misgivings” — both lines quoted in the King Institute’s entry on the book ↗.
The irony is worth sitting with. The sentence that has become one of King’s most reproduced calls to service is a written one — and the mis-citation habit keeps handing it back to the pulpit.
Explore
Filed under
More provenance-checked quotes on the same theme, each with its reuse status.
1929–1968 · Baptist minister and leader of the American civil rights movement
Martin Luther King Jr. was a Baptist minister and the foremost leader of the American civil rights movement, whose nonviolent resistance was grounded in Christian agape love. He pastored Dexter Avenue Baptist Church in Montgomery — where he preached the 1957 sermon so often misidentified as this quotation’s source — before returning to Atlanta as co-pastor of Ebenezer. Strength to Love (1963), the sermon collection in which this line was published, was drafted in part during a fifteen-day jail stay in Albany, Georgia, and became the first volume of sermons by an African American preacher widely available to a white readership.
For writers & researchers
Cite this
Primary source
Martin Luther King Jr., “Three Dimensions of a Complete Life,” in Strength to Love (New York: Harper & Row, 1963), 72. The sermon begins at page 67; the page was verified on paper by Quote Investigator, “Quote Origin: Life’s Most Persistent and Urgent Question Is, ‘What Are You Doing for Others?’” (18 January 2016). The sentence is not in the King Institute’s transcript of the 1957 sermon “Conquering Self-Centeredness,” to which it is usually credited.
This verification page
Quotle.info. “Who really said ‘Life's most persistent and urgent question is, 'What are you doing for others?'’?” Last verified 4 Aug 2026. https://quotle.info/who-said/lifes-most-persistent-and-urgent-question-is-what-are-you/