The real origins

A house divided against itself: 10 famous phrases with biblical roots

We use a lot of set phrases every day without giving much thought to where they came from. But you might be surprised to learn that many of them, even the ones you’d least expect, have biblical roots. Some have survived for centuries with barely a change, while others have taken on surprising new meanings. How does a saying last that long? From "A house divided against itself cannot stand" to "by the skin of your teeth," here are 10 everyday expressions that came straight from the Bible.

Most people associate "A house divided against itself cannot stand" with Abraham Lincoln, who used it in a famous 1858 speech while accepting the Republican nomination for US Senate. But the phrase is much older, with roots in the Bible.

It appears three times in the New Testament, used by Jesus to make a point during a dispute. According to the narrative, after he healed a man possessed by a demon, some leaders accused him of using Satan’s power. Jesus turned their argument against them: why would Satan fight his own forces? A kingdom or household divided against itself cannot survive. As English Bible translations spread, biblical expressions entered everyday speech. By the 1700s, this phrase was being used to describe feuding families, struggling businesses, and divided political groups, even before Lincoln made it famous in American history.

When someone stops to help a stranger in trouble, we call them a "Good Samaritan." It’s an everyday expression, but few know it comes from a biblical story.

In the Gospel of Luke, Jesus tells of a Jewish traveler who is robbed and beaten, left barely alive by the roadside. Several people pass him without stopping, but a Samaritan, a member of a community that had a long-standing rivalry with the Jews, stops to help and tends to his wounds. The message is clear: kindness can come from and be given to someone you least expect, even someone your own community regards as an outsider. As the story spread through Christian teaching and English Bible translations, "Good Samaritan" gradually entered everyday language. By the mid 1600s, it was becoming an established expression for anyone who goes out of their way to help someone in need.

Today, "an eye for an eye" often sounds like a license to get even, but its original purpose was almost the opposite.

The principle appears in several Old Testament passages and in much older legal codes, including the Code of Hammurabi. Known as lex talionis, it established punishment to match the offense, limiting the kind of endless blood feuds in which one injury could trigger another, and another. Rather than permitting people to take revenge, it set a boundary: no more than the offense deserved. In fact, in the New Testament (Matthew 5:38–39), Jesus criticizes the use of this rule as a justification for personal vengeance. William Tyndale used the wording "an eye for an eye" in his 1526 New Testament version, and the King James Bible helped popularize it. As Bible translations spread, the phrase entered everyday English. Over time, the expression moved from the language of law into everyday speech, where it now reflects an all-too-human urge.

When someone says "the writing is on the wall," they’re warning you that trouble is coming and that it looks hard to avoid, but this everyday expression began with a scene straight out of the Bible.

In the Old Testament, King Belshazzar of Babylon throws a lavish feast and drinks from sacred vessels taken from the Jewish temple. Suddenly, a mysterious hand appears and writes four Aramaic words on the palace wall: Mene, Mene, Tekel, Upharsin. The prophet Daniel interprets the message as a warning that the king’s reign is about to end, and that very night, Babylon falls. In the 1500s, early English writers and theologians used the story as a divine warning to corrupt rulers. By 1720, Jonathan Swift, author of Gulliver's Travels (1726), was using "the handwriting on the wall" as a broader warning of trouble, without relying on the original religious meaning. By the 1800s, the expression had become part of everyday English as a way of saying that the signs are there; you just have to be willing to read them.

A "wolf in sheep’s clothing" is someone who seems harmless or trustworthy but is hiding bad intentions. The expression has kept much of its original meaning for centuries, though it began as a warning about a very specific kind of deceivers.

In Matthew 7:15, Jesus warns his followers about false prophets, saying, "They come to you in sheep’s clothing, but inwardly they are ferocious wolves." The image was strong: a dangerous predator disguised as something gentle. The King James Bible, published in 1611, helped spread the phrase throughout the English-speaking world. During the 1700s and 1800s, writers began applying it to dishonest politicians or deceptive lawyers. By the 19th century, the wolf in sheep’s clothing had moved away from its strictly religious meaning and entered everyday speech as a label for anyone whose friendly appearance hides a less nice side.

Ever had a coworker try to teach you a computer program they barely understand themselves? That’s a perfect example of "the blind leading the blind", and this familiar expression has a long history behind it.

It comes from Matthew 15:14, where Jesus warns about religious leaders who actually don’t follow God: "If the blind lead the blind, both will fall into a pit." The image stuck, and in 1500, Dutch scholar Desiderius Erasmus included the saying in Adagia, his widely read collection of proverbs. By the 1700s, as English Bible translations became more widely read, the biblical expression found its way into everyday language. Writers and playwrights began using it to criticize incompetent politicians, bad doctors, or clueless artists. Over time, its meaning broadened into the phrase we know today: people who don’t know what they’re doing trying to lead others who are just as lost.

"Money is the root of all evil" is a saying many people attribute to the Bible, but the thing is that’s not quite what the Bible says. The original warning is about the love of money, not money itself; a small change that makes a big difference.

In 1 Timothy 6:10, the apostle Paul says, "The love of money is a root of all kinds of evil," to warn a young pastor named Timothy that the pursuit of wealth could lead people away from their faith and bring them trouble. The target was greed, not the contents of your wallet. By the 14th century, the saying had become a familiar warning against avarice in Catholic preaching and also appeared in Geoffrey Chaucer’s famous The Canterbury Tales (1476-1477). Then, the King James Bible (1611) helped cement the wording in English. As biblical language spread into everyday speech, the original warning gradually lost a few words and some of its nuance. Today, "money is the root of all evil" is often used to criticize not just greed, but money itself and even capitalism.

Ever made it to the airport just as the gate was closing, or escaped a serious mistake at the very last second? You might say you got away "by the skin of your teeth." It’s a strange expression, though, so where did it come from?

The phrase traces back to the biblical Book of Job, where Job describes his terrible suffering and says in the King James Version, "I have escaped by the skin of my teeth" (Job 19:20). Although scholars still debate the use of "teeth" in this translation, Job, worn down by pain and illness, was describing survival at the very edge of endurance, not a last-second getaway. Over time, writers such as John Milton in Paradise Lost (1667), Charles Dickens in David Copperfield (1849-1850), and Victor Hugo in Les Misérables (1862) helped carry the expression into literature and consequently into everyday speech. By the 19th and 20th centuries, its religious context had faded, leaving us with the meaning we know today: escaping danger or succeeding by the narrowest margin.

Imagine a struggling football team pulling off a stunning upset against a longtime champion. When the underdogs are on top, the saying "the last shall be first" seems to fit perfectly. But this familiar expression began with a much more complex idea than an unexpected win.

The phrase comes from the Gospel of Matthew, where Jesus declares, "The last shall be first, and the first shall be last." In an ancient world where wealth, power, and high social standing were often viewed as signs of God's favor, he turned that order upside down. In the Kingdom of God, he taught, the humble and overlooked could be honored above the powerful and privileged. By the 17th century, the saying had also become a familiar way to encourage people facing hard times. And in the 19th and 20th centuries, it took on broader social and political meaning, inspiring people fighting for equality and liberation.

Got neighbors who are always ready to lend a hand and never expect anything in return? You might call them "the salt of the earth". Today, it’s a warm compliment, but its roots go back directly to the Bible.

In Matthew 5:13, Jesus tells his followers, "You are the salt of the earth: but if the salt have lost his savour, wherewith shall it be salted?" In the first century, salt was highly prized, used to preserve food, treat wounds, mark sacred agreements, and in some places, it even served as a form of payment. So the comparison carried a powerful message: just as salt kept food from spoiling, people should help preserve goodness and integrity in the world. The expression later spread into everyday English, appearing in Geoffrey Chaucer’s The Canterbury Tales in the 14th century. Over time, its religious meaning faded, and by the 19th century, the phrase shifted from urging people to live with integrity to describing those who do.

Body oddities

You have bugs in your face and bones full of holes—12 creepy body facts

Image: CDC

The human body is a marvel of biology—but sometimes, it's downright disturbing. Did you know it’s possible to cry blood? Or that we have taste receptors in our stomachs? From mysterious functions to deeply unsettling facts, our bodies are full of creepy surprises hiding beneath the surface. Here are 12 weird but true insights into what’s really going on inside you.

Image: Kimia Zarifi

Unlike most body parts, ears (and noses) continue to grow as you age. It’s not just cartilage at work—gravity slowly stretches skin and tissue, making ears longer over time.

This process, sometimes called "gravity-induced elongation," only starts to become more noticeable after age 30. That’s why elderly people often seem to have larger ears, even if they were proportionate in youth.

Image: Sander Dalhuisen

Receptors similar to those on your tongue exist in your stomach and intestines. They don’t "taste" in the traditional sense, though, but detect chemical signals.

Thanks to these oddly placed "taste" receptors, our bodies help regulate digestion and appetite by detecting nutrients and potential toxins. They’re crucial for gut-brain communication and may even influence cravings.

Image: Ali Shoaee

Yes, you read that right. Your eyelashes are home to Demodex mites—tiny, spider-like creatures that feed on dead skin cells and oils around hair follicles.

It may sound like something out of a horror movie, but most people—especially adults—have them. These mites emerge at night, mate on your eyelids, and retreat by morning. They’re harmless, but still undeniably creepy.

Image: Ana Itonishvili

Your body emits a small amount of radiation due to naturally occurring elements like potassium-40 and carbon-14, which are present in body tissues.

While this natural radioactivity is harmless, it’s still measurable. A single human body can emit around 7,000 particles per second—enough to trigger some sensitive detectors.

Image: Chaozzy Lin

Called haemolacria, it’s a rare condition where blood mixes with tears. Its causes can include infections, injuries, tumors, or hormonal changes.

Though quite dramatic and certainly alarming, some cases are benign. It has been documented in both adults and children, and it is often linked to extreme stress.

Image: MJH SHIKDER

Even just walking through a room, you leave behind a cloud of genetic material—skin cells, saliva, and sweat—all rich in your DNA.

Sometimes called a "biological fingerprint," this material is enough to identify you. Law enforcement and forensic scientists can even recover DNA from air filters or dust!

Image: Robina Weermeijer

Some people are born with supernumerary organs—extra kidneys, spleens, or even, in extremely rare cases, hearts. These additional organs are often non-functional but can still be detected.

For example, an estimated 1 in 1,000 people has an extra spleen, often discovered by accident during unrelated scans or surgery.

Image: Anshita Nair

Lack of sleep triggers glial cells in the brain to break down and consume parts of synapses—literally "cleaning house" in an extreme way.

This self-cannibalization can lead to cognitive decline and has been linked to neurodegenerative diseases in chronic cases.

Image: Alessandro La Becca

Osteomas are benign bone tumors that can sometimes protrude through the skin, resembling small "horns." Most appear on the skull or jaw.

Though rare, some osteomas can grow several inches. Surgical removal is usually performed for cosmetic reasons unless the growth interferes with normal function.

Image: Ümit Yıldırım

The human mouth can harbor over 700 different types of bacteria—many more than you'd find on a toilet seat.

Most of these bacteria are harmless—and even essential for healthy bodily functions—but under poor hygiene or illness, they can cause infections, tooth decay, or even contribute to heart disease if they enter the bloodstream.

Image: Robina Weermeijer

In extremely rare cases, a type of tumor called a teratoma can develop in the lungs and contain hair, teeth, or even eye-like tissue.

Teratomas are usually benign but still quite bizarre. They form from germ cells and can grow almost any tissue type due to their stem cell origin.

Image: Harlie Raethel

Even the hardest bones in your body are porous like a sponge. Under a microscope, they reveal a honeycomb structure filled with blood vessels and bone marrow.

This structure makes bones both strong and lightweight. However, in conditions like osteoporosis, those holes widen, weakening the bone from the inside.