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Who really said it

All truths are easy to understand once they are discovered; the point is to discover them

Attributed to Galileo Galilei 1564–1642 · Italian astronomer, physicist and mathematician
Attributed Rights unconfirmed

Widely printed as Galileo’s, and it does sound like him. But no primary source has been produced. Wikiquote keeps it in its “Attributed” section ↗ — the list for lines credited to him without a source — and offers a single citation: a 1999 business-inspiration book. We searched three of his major works ourselves and found nothing like it.

Last verified 23 Aug 2026 · how we verify · spot an error?

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Unconfirmed quote & credit

“All truths are easy to understand once they are discovered; the point is to discover them” Attributed to Galileo Galilei, but with no known primary source. Wikiquote lists it among his unsourced attributed quotations, citing only Melissa Giovagnoli, Angels in the Workplace (San Francisco: Jossey-Bass, 1999). We found no match in the Dialogue Concerning the Two Chief World Systems, in Two New Sciences, or in Stillman Drake's Discoveries and Opinions of Galileo.

Can you use it?

We couldn’t establish where this was first published, so there’s no rights status to give. Credit it as shown above — just don’t present it as public domain, and get permission for commercial or published reuse.

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In context

Evoking the world of Galileo Galilei — Italian astronomer, physicist, engineer and polymath. Theme: "All truths are easy to understand once they are discovered; the point is to discover them". 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.

Minimalist

Minimalist editorial slide for the quote "All truths are easy to understand once they are discovered; the point is to discover them". Clean background, a single muted accent color, generous negative space, subtle paper or linen texture, no literal illustration — let the words carry it. Reserve clear space for a serif quote and a small credit line. No lettering in the image itself.

Provenance

What we could and could not find

Primary source
None known
Wikiquote status
Attributed — its section for unsourced credits, distinct from the “Misattributed” section it also keeps for Galileo
Oldest citation offered
Melissa Giovagnoli, Angels in the Workplace (San Francisco: Jossey-Bass, 1999)
Searched without a match
Dialogo sopra i due massimi sistemi; Two New Sciences; Drake’s Discoveries and Opinions of Galileo

All truths are easy to understand once they are discovered; the point is to discover them.

We print the line as it circulates. We have not found it in anything Galileo wrote, so there is no fuller original context to show.

Wikiquote’s Attributed section for Galileo

How we verified this

We are not asserting a rights status. Public-domain status would depend on a specific pre-1931 work containing this wording, and we have not found any work containing it at all. The oldest text anyone points to is from 1999 and is in copyright; whether the sentence originated there, in an earlier paraphrase, or with Galileo himself is exactly what we could not establish.

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

What gets claimed for it

Nothing here is proven wrong. What is wrong is the confidence with which the line gets sourced.

Galileo’s Dialogue (1632) Not in the text

The line is sometimes said to come from the Dialogue, as an exchange between Salviati and Sagredo. We searched the complete Italian text ↗ and found no such passage — no sentence there pairs truth with ease of understanding.

Galileo Galilei Credited without a source

Aggregators print the line as Galileo’s with no work, date or page. Wikiquote is more careful ↗ and files it as unsourced.

It may well be his. On the evidence available, nobody can show that it is — and the specialist entry says so plainly ↗.

Context

Why it mattered

The sentiment is a real one in Galileo’s world: that a demonstration, once made, looks obvious, and that the whole difficulty lies in getting there first. He wrote things close to it in spirit. What he does not appear to have written is this sentence.

That gap is ordinary. Galileo is one of the names lines drift toward — four separate quotations on Wikiquote’s Galileo page are filed as outright misattributions, including “Eppur si muove” and “Measure what is measurable.” A crisp aphorism about discovery is exactly the shape that ends up under his name.

It may well be his. Nobody has yet shown that it is.

Read the full story

Wikiquote draws a line most quotation sites do not: Attributed means credited to him without a source, while Misattributed means positively traced to someone else. This sentence sits in the first list, which is why we call it attributed rather than disputed. Asserting it is not his would claim more than the evidence supports, in the opposite direction.

We searched three works: the Dialogue in Italian, Two New Sciences in the 1914 English translation, and Drake’s collection of the shorter pieces. That is not everything Galileo wrote — Favaro’s national edition runs to twenty volumes ↗, published between 1890 and 1909 and containing a great deal of correspondence — so absence from three books is a real result but not a verdict.

Explore

Filed under

More provenance-checked quotes on the same theme, each with its reuse status.

Truth Knowledge Work

Go further

Dig deeper

Trusted places to keep pulling the thread — primary archives, fact-checks, and scholarship. We show how we used each one before you leave.

Wikiquote: Galileo Galileien.wikiquote.org

Files this line under Attributed — unsourced — citing only a 1999 book, and keeps a separate Misattributed list that does not include it.
Wikiquote italiano: Galileo Galileiit.wikiquote.org

Carries an Italian form of the line sourced to a 2018 popular-science translation, not to Galileo.
Dialogo sopra i due massimi sistemi (full text)archive.org

The complete Italian Dialogue. We searched it; the sentence is not there.
Dialogues Concerning Two New Sciences (1914)archive.org

The Crew and de Salvio translation of Galileo’s last book. Searched; no match.
Drake, Discoveries and Opinions of Galileo (1957)archive.org

The standard English collection of the shorter works. Searched; no match.
Giovagnoli, Angels in the Workplace (1999)archive.org

The catalogue record for the only book Wikiquote cites. Access-restricted, so its pages could not be read.
Le opere di Galileo Galilei (Favaro), volume indexit.wikisource.org

The national edition of Galileo’s complete works, volumes I–XX, published 1890–1909 — the measure of how much we did not search.

The author

About Galileo Galilei

Galileo Galilei

1564–1642 · Italian astronomer, physicist, engineer and polymath

Galileo Galilei was born in Pisa in 1564 and has been called the father of observational astronomy, of classical physics and of the scientific method. He turned a telescope on Jupiter and found moons, argued for the Copernican system in the Dialogue Concerning the Two Chief World Systems (1632), was condemned for it in 1633 and spent the rest of his life under house arrest, writing the Two New Sciences there. He is also one of the internet’s most reliable magnets for crisp sentences about truth and discovery that nobody can find in his books.

For writers & researchers

Cite this

Best available citation

No primary source located. Earliest citation we could document: Wikiquote, “Galileo Galilei,” Attributed ↗, which cites Melissa Giovagnoli, Angels in the Workplace: Stories and Inspirations for Creating a New World of Work (San Francisco: Jossey-Bass, 1999). The line does not appear in the Dialogo sopra i due massimi sistemi, in Dialogues Concerning Two New Sciences (trans. Crew and de Salvio, 1914), or in Stillman Drake, trans., Discoveries and Opinions of Galileo (1957).

This verification page

Quotle.info. “Who really said ‘All truths are easy to understand once they are discovered; the point is to discover them’?” Last verified 23 Aug 2026. https://quotle.info/who-said/all-truths-are-easy-to-understand-once-they-are-discovered/

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