Anatta teaches that the self is not a fixed, unchanging entity but rather a collection of constantly changing mental and physical phenomena. This concept challenges the notion of a permanent, independent self and emphasizes the interconnectedness of all things.

Theravada Buddhism, also known as the 'Way of the Elders', is the oldest surviving Buddhist school and places a strong emphasis on the concept of Anatta. Theravada teachings focus on the attainment of liberation from suffering through the understanding of the impermanence of the self and the practice of mindfulness.

The Four Noble Truths are fundamental teachings in Buddhism that explain the nature of suffering and the path to its cessation. The second Noble Truth, known as the 'Truth of the Origin of Suffering', states that suffering arises from attachment to the self and craving for permanence. Anatta, by negating the existence of a permanent self, challenges this attachment and points to the possibility of liberation from suffering.

Anatta does not negate the idea of rebirth or reincarnation, but it challenges the notion of a permanent, unchanging self that transmigrates from one life to another. Instead, it suggests that what is reborn is a stream of interconnected mental and physical phenomena, without a fixed, independent self.

The concept of Anatta plays a crucial role in Buddhist meditation practices. By contemplating the impermanence and lack of inherent existence of the self, practitioners can develop concentration, focus, compassion, loving-kindness, and gain insight into the true nature of reality, leading to a deeper understanding of the teachings and the path to liberation.

The concept of Anatta is attributed to Gautama Buddha, the founder of Buddhism. Buddha's teachings emphasized the impermanence and suffering inherent in existence, and he challenged the notion of a permanent, unchanging self. His insights on Anatta became a cornerstone of Buddhist philosophy and practice.

Anatta challenges the idea of a fixed, unchanging personal identity. It asserts that the self is not a permanent entity but rather a collection of constantly changing mental and physical phenomena. This challenges the notion of a separate, independent self and emphasizes the interconnectedness of all things.

Anatta does not negate the concept of karma, which refers to the law of cause and effect. While Anatta challenges the notion of a permanent self, it recognizes that actions performed in one's lifetime have consequences that extend beyond this life. Karma is seen as a process of interconnectedness, where actions and their consequences are linked across lifetimes.

In Buddhism, liberation or nirvana is the ultimate goal of the spiritual path. Anatta, by negating the existence of a permanent self, is seen as a prerequisite for achieving liberation. By letting go of the illusion of a separate self, practitioners can transcend the cycle of suffering and attain a state of peace and enlightenment.

Anatta, meaning 'not-self', is characterized by impermanence, suffering, and non-self. It negates the idea of a permanent, unchanging self. Therefore, permanence is not a characteristic of Anatta.

The concept of Anatta has had a significant impact on contemporary philosophy. It has influenced existentialism and phenomenology by challenging the notion of a fixed, unchanging self. It has also influenced postmodernism and deconstruction by questioning the stability and coherence of the self and the foundations of knowledge.

Mindfulness, in Buddhist practice, involves paying attention to the present moment without judgment. By contemplating the impermanence and lack of inherent existence of the self (Anatta), practitioners can cultivate mindfulness and develop a deeper understanding of the nature of reality.

Advaita Vedanta is a school of Hindu philosophy that emphasizes the oneness of Brahman, the ultimate reality. It does not subscribe to the concept of Anatta, which is a fundamental teaching in Buddhism.

Anatta challenges the idea of absolute free will by emphasizing the interconnectedness of all things. While it does not negate the concept of free will entirely, it suggests that our choices and actions are influenced by our past actions, our environment, and the actions of others.

Anatta challenges the idea of a fixed, unchanging self and encourages practitioners to let go of attachments and desires. Developing a sense of self-importance contradicts the teachings of Anatta.