Anatta, or "non-self," is a fundamental concept in Buddhism that suggests there is no permanent, unchanging self or soul in living beings. Instead, individuals are made up of constantly changing physical and mental components, known as the Five Aggregates. This idea challenges the notion of a fixed identity and encourages a deeper understanding of the nature of existence. The teaching of Anatta emphasizes that clinging to the idea of a permanent self leads to suffering. By recognizing the impermanent and interconnected nature of all things, individuals can cultivate a sense of detachment and reduce their suffering, ultimately moving towards enlightenment and liberation from the cycle of samsara.