Some people believe in a true self. 
In Hinduism, many people believe in the Ātman. 
Some thinkers say the Ātman is like a rider. The body is like a chariot. The mind and senses help the rider move.
One idea is that the Ātman is eternal. It does not die when the body dies. It is like changing old clothes for new ones.
People study this to find peace and freedom. They want to know their true self. It is a very big idea to wonder about.
In Hinduism, many people believe in the Ātman. 
Some ancient texts use a special story to explain this. They say the Self is like a rider in a chariot. 
There are many different views on the Ātman. In the Samkhya school, there are many different selves. In the Advaita Vedanta school, there is only one Self. This one Self is also called Brahman. Some say the Ātman and Brahman are the same. Others say they are different but connected. The Bhagavad Gita says the Ātman cannot be killed. It is like changing old clothes for new ones. People seek self-knowledge to reach a state called moksha, or liberation.
In Hinduism, many people believe in the Ātman. 
To understand how the Ātman works, thinkers use special comparisons. One famous idea comes from the Katha Upanishad. 
The history of this idea goes back thousands of years. The earliest use of the word Ātman is found in the Rig Veda. This is one of the oldest sacred texts in India. Later, the Upanishads made the Ātman a very central topic. These ancient books teach that the Ātman is the ultimate essence of the universe. They also describe it as a vital breath within humans. Around 100 BCE, a thinker named Badarayana wrote the Brahmasutra. This work helped bring many different ideas about the Self together.
There are many specific details and names in these traditions. For example, the Advaita Vedanta school teaches there is only one Self. They believe this Self is the same as Brahman, the highest reality. In contrast, the Samkhya school believes there are many different selves. They call this essence Purusha. The Brihadaranyaka Upanishad, written between 800 and 600 BCE, says the Ātman is everywhere. It even reaches the very tips of a person's nails. Some texts say the Ātman lives deep within the heart.
These beliefs connect to how people view life and death. The Bhagavad Gita uses a famous example to explain this. It says that the Ātman is like a person changing old clothes for new ones. As a person moves through different lives, the Ātman remains unaffected. It cannot be killed and does not die. This idea is a major difference from Buddhism. The Buddhist doctrine of Anatta holds that there is no unchanging Self. For Hindus, seeking self-knowledge is the way to reach moksha, or liberation.
In Hindu philosophy, the Ātman is the true, innermost essence of a living being. It is conceived as an eternal and unchanging reality. While the term is often translated as "soul," many scholars suggest "Self" is a more accurate description. The Ātman is distinct from the individual personality or the embodied being, known as the Jīva. It is also separate from the ego, or Ahamkara, which is the sense of self-importance. Furthermore, it is different from the emotional mind, called Citta, and the natural, material aspects of life, known as prakṛti. 
To understand how the Ātman relates to the human experience, ancient texts use detailed analogies. The Katha Upanishad, written between the 5th and 1st centuries BCE, provides a famous comparison involving a chariot. In this model, the Ātman is the rider sitting within the vehicle. The physical body acts as the chariot itself. The intellect serves as the charioteer who directs the journey. The mind functions as the reins used to guide the movement. Finally, the senses are described as the horses, while the objects of sense are the paths they travel. When the Self is unified and integrated with these parts, a person can reach a state of bliss and liberation.
Different schools of Indian philosophy offer various ways to understand the nature of this essence. In the Samkhya school, which is one of the oldest dualistic traditions, the essence is called Purusha. Purusha is described as absolute, independent, and unknowable through the senses. It is a pure, nonattributive consciousness that neither produces nor is produced by anything else. Unlike other traditions, Samkhya believes there are innumerable individual Purushas. In contrast, the Advaita Vedanta school teaches that there is only one single Self. For Advaita followers, the Ātman is pure, undifferentiated witness-consciousness, or sakshi, that exists beyond all phenomena.
The relationship between the individual Ātman and the supreme reality, Brahman, is a central debate. The Upanishads, ancient sacred texts, present different views on this connection. Some teachings suggest that Ātman and Brahman are identical, meaning they are one and the same. Others suggest that the Ātman is a part of Brahman but remains distinct. This led to various theories like Bhedabheda, which says they are both different and non-different. Another view, Dvaita, is dualistic and sees them as separate. A third view, Vishishtadvaita, is known as qualified non-dualism, suggesting they are non-different but involve a sense of dependence.
The history of the Ātman concept can be traced back to the very earliest Indian scriptures. The first recorded use of the word appears in the Rig Veda, one of the oldest texts in existence. Ancient grammarians like Yāska noted that Ātman could mean a pervading principle or a sentient essence. Later, the Upanishads became the primary source for exploring the Ātman as the ultimate essence of the universe. Around 100 BCE, a thinker named Badarayana composed the Brahmasutra. This work attempted to synthesize many conflicting theories. It argued that while Ātman and Brahman may seem different during states of ignorance, they are identical at the level of self-realization.
The scale and location of the Ātman are described with great significance in various texts. The Brihadaranyaka Upanishad, dating from 800 to 600 BCE, claims the Ātman permeates everything. It is said to extend even to the very tips of a person's nails. While it pervades the whole body, many texts emphasize the heart as its special location. They describe the heart not as a physical organ, but as an inner "cave" or guha where the Ātman resides. The Chandogya Upanishad uses the metaphor of rivers to explain this connection. Just as many rivers flow into one single ocean, individual souls are seen as manifestations of one universal soul.
These beliefs create a major distinction between Hinduism and other philosophical systems. For example, the Buddhist doctrine of Anatta holds that there is no unchanging essence or Self to be found. This is a fundamental disagreement with the orthodox Hindu schools. In the Bhagavad Gita, the indestructible nature of the Ātman is emphasized to explain life and death. Krishna uses the analogy of changing clothes to describe how the Ātman moves between bodies. Just as a person discards old garments for new ones, the Ātman leaves an old body to inhabit a new one. Because the Ātman is eternal, it is said to neither kill nor be killed.
Ultimately, the study of the Ātman is tied to the goal of achieving moksha, or liberation. This is reached through the acquisition of self-knowledge, also called Atmajnana or Brahmajnana. By understanding the true nature of the Self, a person can move beyond the changing material world. This journey involves moving from the identification with the ego and the body toward the realization of the eternal essence. 
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