Things are always changing. 
Many people think about change. 
In Buddhism, people believe life is always changing. They say things come and then go away. This can cause sadness for some.
In Hinduism, people also see change. They believe the body changes, but the soul stays the same. This helps them find happiness.
Long ago, a Greek thinker named Heraclitus wrote about this. He said everything flows like a river. You cannot step in the same river twice.
Change is a part of our world. It is a big thing to wonder about.
Many people wonder about change. This idea is called impermanence. It means that nothing stays the same forever. 
In Buddhism, people use the word anicca for this. They believe that all things are always changing. This includes our bodies and our minds. Because things change and go away, it can cause sadness. This is one of the three marks of existence in Buddhism.
Hinduism also teaches about impermanence. They use the word anitya. Many Hindus believe the material world changes. However, they believe the soul, or atman, stays the same. This idea helps people find a permanent truth.
In ancient Greece, a thinker named Heraclitus wrote about change. He said that everything flows. He famously said that no man steps in the same river twice. 
Other Greek thinkers had different ideas. Plato did not agree with Heraclitus. He thought that if things change too fast, we cannot truly know them. These big ideas help us think about how the world works.
Impermanence is a big idea about how the world works. It is the study of change and how nothing stays the same. Many different religions and thinkers have explored this concept. In Eastern philosophy, it is a very important part of Buddhism. It is also a key part of Hinduism. In Western philosophy, it is often linked to the idea of "becoming." People use these ideas to understand why things grow, change, and fade away. 
In Buddhism, this idea is called anicca. This word comes from the Pali language. It means the absence of anything being constant or permanent. Buddhists believe that all things are in a state of continuous change. This includes both physical things and things in our minds. They teach that all existence is transient and inconstant. Because things change and pass away, it can lead to suffering or Dukkha. This is one of the three marks of existence in Buddhist teaching. 
Hinduism also has a word for this called anitya. This term appears in ancient writings like the Rigveda and the Katha Upanishad. Many Hindu traditions believe the material world is impermanent. However, they see this as an opportunity. They believe people can find something that is truly permanent. This permanent thing is called the atman, or the Self. In the Bhagavad Gita, Krishna explains this to a man named Arjuna. He says the body decays, but the soul is undying and unchanging.
Western thinkers also studied these patterns of change. A Greek philosopher named Heraclitus is very famous for this. He taught a doctrine called panta rhei, which means "everything flows." He famously said that no man ever steps in the same river twice. This is because the water is always moving and changing. Another thinker, Parmenides, had a different view about being. These two men are often called the founders of ontology. Ontology is the study of how things exist. 
Not all philosophers agreed on how change works. Plato argued against the idea of constant flux. He thought that if things changed too fast, we could not truly know them. Later, the Roman leader Marcus Aurelius wrote about how things are always in transition. He noted that everything is subject to decay. Even today, these ideas show up in books and music. A film called Mujo and a song by the band Architects both use these themes. These old ideas still help us think about our world today. 
Impermanence is a fundamental philosophical concept regarding the nature of change. It addresses the problem of how things exist when they are constantly shifting. This idea is explored across many different religious traditions and philosophical systems. In Eastern thought, it plays a central role in Buddhist and Hindu teachings. In Western philosophy, it is often discussed through the concept of "becoming." This term describes a state of transition rather than a fixed state of being. 
In many Indian religions, the mechanism of change is described through specific linguistic terms. The Pali word for impermanence is anicca. This is a compound word where "a" means non- and "nicca" means constant or permanent. Therefore, anicca describes the absence of continuity. The Sanskrit equivalent is anitya. These terms suggest that nothing in the world remains the same over time. Instead, all things exist in a continuous state of flux.
Buddhism provides a detailed framework for understanding this process. It teaches that all conditioned existence is transient, evanescent, and inconstant. This includes both material objects and mental events. According to Buddhist doctrine, all things are compounded objects in a state of continuous change. They are subject to decline and eventual destruction. This concept is one of the three interlocking marks of existence. The other two marks are suffering, known as dukkha, and the lack of a permanent soul, called anatta. 
Hindusim also holds the doctrine of anitya, but it applies the concept differently. The term appears in ancient texts like the Rigveda and the Katha Upanishad. In the Katha Upanishad, the text asserts that the material world is impermanent. However, this impermanence offers an opportunity to reach what is permanent, known as nitya. This permanent reality is the atman, or the Self. The Bhagavad Gita also explores this distinction. In this text, Krishna explains to Arjuna that while the physical body decays and dies, the soul remains undying and unchanging.
While Buddhism and Hinduism both agree that nothing lasts, they disagree on the nature of the self. Buddhism uses the concept of anicca to support the doctrine of anatta, or non-soul. It teaches that attachment to changing things produces dukkha, or sorrow. To reach liberation, known as nibbana, these attachments must be discarded. In contrast, Hinduism suggests that some changes can lead to happiness. Seeking self-knowledge can lead to liberation, known as moksha. For Hindus, the permanent nitya is found in the atman.
Western philosophy offers a different lineage of thought regarding change. The Greek philosopher Heraclitus is famous for his doctrine of panta rhei, which means "everything flows." He believed that ever-present change was the fundamental essence of the universe. He famously stated that no man ever steps in the same river twice. Heraclitus also believed in a unity of opposites. He suggested that all entities are characterized by pairs of contrary properties. He also noted that all entities come to be according to the Logos, a term meaning reason or account.
This idea of change created a major debate in ancient Greece. Heraclitus is often contrasted with Parmenides. While Heraclitus focused on "becoming," Parmenides focused on "being." Parmenides argued that whatever is, is, and what is not cannot be. Because of these two thinkers, they are often called the founders of ontology. Ontology is the branch of philosophy that studies the nature of existence. Later, Plato rejected the idea of total flux. He argued that if an object is never in the same state, it cannot be truly known by an observer.
Other thinkers have contributed various views on the subject throughout history. The philosopher Democritus suggested that assemblages of atoms are impermanent. The Stoic leader Marcus Aurelius wrote in his Meditations that everything is in transition. He noted that all existing things are subject to fragmentation and rot. Even today, the concept of impermanence appears in modern culture. It is the title of a film by Akio Jissoji and a track by the band Architects. These ideas continue to shape how humans understand the passage of time.
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