What is the philoshopy of upnashids?

The Upanishads are ancient Indian texts that explore the nature of reality, the self, and the ultimate truth (Brahman). They emphasize the importance of self-realization, meditation, and spiritual practices to attain liberation (moksha) from the cycle of birth and death (samsara). The Upanishads teach that the individual soul (Atman) is ultimately one with the universal soul (Brahman), leading to a profound sense of interconnectedness and unity.