A doppelgänger is a double of a person. 

A doppelgänger is a double of a living person. 

Many old stories tell of these doubles. In Egypt, a spirit double had the same feelings. In Norse myths, a double does things early. This can be a strange thing to see.
Some people think a double is a sign. It might mean something bad is coming. But other people find them calm. It depends on the story.
Authors love to write about doubles. They use them to show two sides of a person. This makes for a good tale.
It is a very old idea. People all over the world wonder about it.
A doppelgänger is a supernatural double of a living person. 

Many cultures have ideas about spirit doubles. In Ancient Egypt, a spirit called a ka had the same feelings as a person. In Norse myths, a double called a vardøger performs actions before the person does them. In some Muslim countries, people believe in a spirit called a karin. This spirit can be helpful or harmful. It often has the same traits as the person.
Some people have reported seeing their own doubles in real life. The poet Percy Bysshe Shelley said he met his own double. The writer Goethe also had a strange dream about seeing his own figure. In 1893, a man named George Tryon was said to have walked through his home while he was far away at sea. 
Authors use doubles in books to show different sides of a person. Edgar Allan Poe wrote about a man followed by a double. Fyodor Dostoyevsky wrote a book called The Double. These stories show how a double can change a life.
A doppelgänger is a supernatural double of a living person. 

Many different cultures have stories about spirit doubles. Ancient Egyptians believed in a "ka." This was a spirit double with the same feelings as a person. In Norse myths, a "vardøger" is a ghostly double. This double performs a person's actions before they actually happen. Finnish myths call this an "etiäinen," which means a "firstcomer." 
Some traditions describe these spirits in specific ways. In many Muslim countries, people speak of a "karin." This spirit double can be helpful or harmful. It usually has the same sex and personality as the person. In Jewish mysticism, the "Sefer Yetzirah" is used to explain certain ideas. The Hebrew letter "Tet" is also used to show how things in nature are not always even. These beliefs help people understand the world around them.
Some famous people claimed to have seen their own doubles. The poet Percy Bysshe Shelley told his wife he met his own double. 
Authors love to use doppelgängers in their books. Edgar Allan Poe wrote a story called "William Wilson." In that tale, a man is followed by a double his whole life. Fyodor Dostoyevsky wrote a book titled "The Double" about an opposite personality. Some stories use doubles to show the two sides of a person. These tales can be spooky or very mysterious. They help readers think about what it means to be oneself.
A doppelgänger is a supernatural double of a living person. 
The word itself is a loanword from German. It literally means "double-walker." In German, the singular and plural forms are identical. However, English writers usually prefer the plural form, "doppelgängers." In German, the noun is capitalized and uses an umlaut over the "a." In English, the word is generally written with a lower-case letter. Writers also often drop the umlaut, spelling it "doppelganger." The first known use of the term was in the 1796 novel *Siebenkäs* by Jean Paul. 
Human history is filled with various cultural versions of the spirit double. Ancient Egyptian mythology describes the "ka." The ka was a tangible spirit double that shared the same memories and feelings as the person. In Norse mythology, people spoke of a "vardøger." This was a ghostly double seen performing a person's actions in advance. Finnish mythology offers a similar concept called an "etiäinen," which means a "firstcomer." 
Different religious traditions provide specific details about how these doubles function. In many majority Muslim countries, the concept of a "karin" or "qarin" exists. The karin is a spirit double that matches the person's sex, race, and temperament. It can be benevolent or harmful. If it is malicious, it may try to persuade a person to follow bad whims. In Jewish mysticism, the *Sefer Yetzirah* and the Hebrew letter "Tet" are used to explain asymmetry in nature. This asymmetry relates to how the world is balanced between different forces.
Several historical figures have claimed to encounter their own doubles. The poet John Donne was said to have seen his wife's doppelgänger in Paris in 1612. This account was recorded in a 1675 biography. The poet Percy Bysshe Shelley also claimed to have met his own doppelgänger. 
Some reported sightings involve physical or strange occurrences. In 1845, a French teacher named Émilie Sagée was alleged to have a double. Students reported that the double would mimic her actions. Some students even claimed they could feel a slight resistance when they tried to touch it. In 1893, Vice-Admiral Sir George Tryon was reportedly seen in his London home. This happened while he was actually on a ship near Syria. Later that same night, his ship, the HMS *Victoria*, collided with another vessel and sank.
Authors frequently use the doppelgänger to explore complex themes in literature. Edgar Allan Poe wrote "William Wilson," a story about a man followed by a double that mirrors him. Fyodor Dostoyevsky used the concept in *The Double* to show a character being exploited by an opposite personality. In Gothic fiction, the motif is very common. Writers use these doubles to represent the duality of human nature or the two sides of a single person. Through these stories, the doppelgänger becomes a tool to examine the human identity.
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