| Explanation | What it rests on | Planning use |
|---|---|---|
| Sneeze as a divine sign in Homer’s Odyssey | Penelope reads her son’s sneeze as a divine blessing in Book 17 | Use as the earliest documented example of a sneeze carrying religious meaning |
| Pope Gregory and the plague | A popular story that ties the custom to a named pope and an epidemic | Present as tradition, not as a settled origin |
| Gesundheit | A German word borrowed into English | Treat as a separate expression with its own route into English |
The Odyssey detail comes from ABP Live’s explainer on where the bless-you habit comes from.
Why do we say God bless you when someone sneezes? The best-documented starting point is an ancient belief that a sneeze carried divine meaning, as in Homer’s Odyssey, while the plague-and-Pope-Gregory explanation remains a popular story rather than a proven origin.
This page sorts the explanations by the kind of evidence behind each one. It belongs with other entries on the origin of common phrases, where the same question applies: can a claim be traced to a dated text, or does it only sound plausible?
What the evidence changes in practice
The way an origin story is told matters more than most people expect. A neat tale repeated often enough starts to sound like fact, and the sneeze blessing is a good example. Sorting the claims by evidence gives clear choices for anyone who wants to explain the custom accurately.
- Lead with the ancient omen. The Odyssey passage is a written, checkable example of a sneeze being read as a sign from the gods. It suits anyone who wants an answer that can be traced to a text.
- Label the Gregory story as a story. It is widely repeated, so it deserves a mention, but a repeated story is not the same as a record. Say that it is the popular account.
- Keep gesundheit apart. It is a German loanword, so folding it into the same history as the English blessing blurs two separate paths.
- Avoid the single-cause answer. A custom can be reinforced by several beliefs over time. Naming one cause with confidence claims more than a single text can support.
These choices also protect against a common mistake in phrase histories: treating the oldest-sounding explanation as the oldest documented one. The sections below apply that test to each claim in turn.
The earliest documented evidence: Homer’s Odyssey
The earliest documented evidence in this pack of a sneeze being given religious meaning is in Homer’s Odyssey. In Book 17, Penelope responds with joy when her son sneezes, because in ABP Live’s account the sneeze had affirmed her words with a divine blessing.
That wording needs careful reading. Penelope is not saying a phrase to her son, and nobody is blessing the sneezer. The sneeze itself is the sign, and Penelope interprets it as divine approval of what she has just said. The passage therefore documents a sneeze omen, not a spoken greeting.
For the question of who started saying bless you, this distinction is the main point. The Odyssey shows that the idea of divine meaning attached to a sneeze is very old. It does not show who first spoke a blessing aloud to a sneezing person, and it would be an overreach to name an inventor from it.
Why the omen matters to the custom
If a sneeze is believed to carry a message from the gods, a listener has a reason to respond to it. Penelope’s reaction shows that response in its earliest documented form: joy, and a reading of the sneeze as confirmation. A later spoken blessing would be a natural development of the same belief, though the Odyssey passage does not itself record that step.
Omen versus greeting: two different things
A sneeze omen and a sneeze greeting are easy to merge, and many origin articles do. An omen is a belief about what the sneeze means. A greeting is a social habit of saying something to the person who sneezed. The Odyssey supports the first.
The distinction gives a useful rule for reading any origin claim.
- Check what the text actually shows. If a passage describes a sneeze being interpreted, it supports an omen tradition. If it quotes words addressed to a sneezer, it supports a greeting.
- Check the date. An undated tradition cannot be placed before or after another one, so it cannot be called the origin.
- Check who is speaking. A passage in a literary work reflects what its author expected readers to find believable, which is useful evidence for belief but not a record of everyday speech.
Applied to the sneeze blessing, the rule keeps the Odyssey in its proper role. It is strong evidence that sneezes were read as meaningful. It is not a citation for the English phrase.
The plague and Pope Gregory story
The most widely repeated explanation links the blessing to Pope Gregory and a plague. In the popular account, a sneeze was treated as a sign of illness, and a blessing was offered as protection. The story is memorable because it gives the custom a single figure, a crisis and a clear motive.
Those same qualities are a reason for caution. A tidy story with one hero and one cause often grows up around a custom after the custom already exists. To count as documented, the Gregory account would need a dated text that records the pope prescribing a sneeze blessing, or an early writer connecting the two. Without one, the better description is a tradition that people use to explain the habit.
The plague story is not necessarily false. The point is that it sits in a different evidence class from the Odyssey passage. A reader can fairly say that people tell it, that it is plausible as a motive, and that the case for it depends on records that would need to be produced. That is more useful than either accepting or dismissing it outright.
When the story is still worth telling
The story earns a place if it is framed honestly. It shows why people find a protective blessing appealing, and it explains why the saying is so often linked to illness in popular memory. It should be offered after the documented material and labelled as the popular account.
Gesundheit as a German loanword
Gesundheit is a separate case. It is a German word that English speakers adopted, so its history belongs to borrowing between languages, not to the English blessing. Both expressions answer a sneeze, which is why they are so often lumped together, but they have different routes into everyday speech.
For anyone asking why English speakers say gesundheit, the practical answer is that the word came in as a borrowing, and the useful evidence is a dictionary entry with dated citations showing when English writers first used it. A claim that the word is just a translation of the English blessing, or the reverse, skips that step.
Keeping the two expressions apart also prevents a common slip. A fact about gesundheit does not automatically explain the English blessing, and a fact about the English blessing does not explain gesundheit.
How to test an origin claim yourself
Anyone can apply the same sorting to other sayings. Historical dictionaries with dated quotations, such as the Oxford English Dictionary, and etymology notes from publishers such as Merriam-Webster are the natural first checks for when a phrase appears in print. Classical texts in published translation help with ancient references. Folklore and linguistics journals, along with library collections on customs, add context on belief and practice.
Three habits make the checking reliable.
- Look for the earliest dated use. A date turns a plausible story into something that can be compared with other claims.
- Separate the belief from the phrase. A belief about sneezes can be much older than the words used to answer them.
- Be wary of a single named inventor. Customs tend to spread through many people, so a lone originator deserves a record behind it.
The same approach works on other entries. The article asking why is it called jaywalking follows a phrase through its recorded use, and the question of why is a drunkard called a lush shows how a popular explanation can compete with a documented one.
Frequently asked questions
What is the earliest documented evidence of blessing a sneezer?
The clearest early example is in Homer’s Odyssey, where Penelope reads her son’s sneeze as a divine blessing in Book 17. It records a sneeze being given religious meaning. It does not record a phrase spoken to the sneezer.
Who started saying bless you?
No individual can be named from the documented evidence. The Odyssey shows that sneezes were read as divine signs long ago, and the spoken custom is best seen as growing out of that kind of belief.
Is the Pope Gregory plague story true?
It is a popular explanation, not a documented origin. It would need a dated text that ties the pope to a sneeze blessing before it could be treated as established history.
Why do we say gesundheit?
Gesundheit is a German loanword that English speakers adopted. It has its own history of borrowing and is not the same expression as the English blessing, even though both answer a sneeze.
