The Upanishads teach that Brahman is the ultimate reality, the source of all existence, and the goal of all spiritual seeking.

The Upanishads teach that Brahman and Atman are identical, meaning that the individual self is ultimately one with the universal self.

The Upanishads teach that the goal of human life is to achieve moksha, or liberation from the cycle of birth and rebirth.

The Bhagavad Gita teaches that the self is unchanging and eternal, and that it is the source of all consciousness and experience.

The Bhagavad Gita teaches that the self is both separate from and identical with the world, meaning that the individual self is both distinct from and a part of the universal self.

The Bhagavad Gita teaches that the goal of human life is to achieve moksha, or liberation from the cycle of birth and rebirth.

The Nyaya-Vaisheshika school of philosophy teaches that the self is a substance, meaning that it is an independent entity that exists on its own.

The Nyaya-Vaisheshika school of philosophy teaches that the self is separate from the world, meaning that the individual self is distinct from the physical world.

The Nyaya-Vaisheshika school of philosophy teaches that the goal of human life is to achieve moksha, or liberation from the cycle of birth and rebirth.

The Mimamsa school of philosophy teaches that the self is an action, meaning that it is a process of performing rituals and duties.

The Mimamsa school of philosophy teaches that the self is separate from the world, meaning that the individual self is distinct from the physical world.

The Mimamsa school of philosophy teaches that the goal of human life is to fulfill one's desires, in accordance with the rules and regulations of the Vedas.

The Advaita Vedanta school of philosophy teaches that the self is a substance, meaning that it is an independent entity that exists on its own.

The Advaita Vedanta school of philosophy teaches that the self is identical with the world, meaning that the individual self is ultimately one with the universal self.

The Advaita Vedanta school of philosophy teaches that the goal of human life is to achieve moksha, or liberation from the cycle of birth and rebirth.