The Upanishads are a collection of ancient Indian texts that explore the nature of reality, consciousness, and the Self. The concept of Atman, or the individual Self, is a central theme in these texts.

Advaita Vedanta, a school of Indian philosophy, teaches that Atman, the individual Self, is identical to Brahman, the universal Self. This is known as the doctrine of non-duality, or Advaita.

Meditation in Indian philosophy is a practice aimed at achieving a state of pure consciousness, controlling the mind and emotions, and connecting with the divine. Different schools of Indian philosophy may emphasize different aspects of meditation, but all share the goal of self-realization.

Buddhist philosophy teaches that consciousness is impermanent, non-dual, and empty of inherent existence. This means that consciousness is constantly changing, it is not separate from the rest of reality, and it does not have a fixed or permanent nature.

'Neti neti' is a Sanskrit phrase that means 'not this, not that'. It is a method of negation used in Indian philosophy to describe Brahman, the ultimate reality. By negating all qualities and attributes, 'neti neti' attempts to point to the ineffable nature of Brahman.

Kashmir Shaivism is a school of Indian philosophy that emphasizes the concepts of Shiva, Shakti, and Spanda. Shiva is the supreme consciousness, Shakti is the dynamic energy of Shiva, and Spanda is the pulsation or vibration of consciousness.

The goal of self-realization in Indian philosophy is to achieve liberation from the cycle of rebirth, experience the true nature of reality, and become one with the divine. This can be achieved through various practices such as meditation, yoga, and self-inquiry.

Bhakti Yoga is a path of devotion in Indian philosophy that emphasizes the cultivation of love, devotion, and surrender to the divine. It is believed that through Bhakti Yoga, one can achieve a deep connection with the divine and experience spiritual liberation.

Maya is a key concept in Indian philosophy that refers to the illusion of the world. It is believed that maya veils the true nature of reality and creates the appearance of a separate and independent world. Maya is often associated with the power of Brahman, the ultimate reality, and is seen as a creative force that manifests the universe.

Samkhya philosophy posits that consciousness is pure consciousness, separate from matter, and the source of all creation. Consciousness is believed to be the ultimate reality and the driving force behind the manifestation of the universe.

'Anatman' is a key concept in Buddhist philosophy that means 'no-self'. It refers to the teaching that there is no permanent, unchanging Self or soul. Buddhist philosophy posits that the Self is an illusion created by the aggregation of various mental and physical phenomena. Anatman is central to the Buddhist understanding of reality and the path to liberation.

Yoga philosophy emphasizes the concepts of Samadhi, Moksha, and Dhyana. Samadhi is a state of deep meditation and absorption in which the mind becomes one with the object of meditation. Moksha is liberation from the cycle of rebirth and the attainment of spiritual freedom. Dhyana is a state of focused concentration and contemplation.

Nirvana is a central concept in Buddhist philosophy and is considered the ultimate goal of Buddhist practice. It is a state of perfect peace, happiness, and liberation from the cycle of rebirth. Nirvana is achieved through the extinction of all desires, attachments, and delusions.

Jainism emphasizes the concepts of Ahimsa (non-violence), Anekantavada (multiple perspectives), and Moksha (liberation). Ahimsa is the principle of non-violence and compassion towards all living beings. Anekantavada is the belief that reality is multifaceted and can be viewed from different perspectives. Moksha is the ultimate goal of Jainism, which is the liberation of the soul from the cycle of rebirth.

Brahman is a central concept in Advaita Vedanta and is considered the ultimate reality. It is the source of all creation, the ground of all existence, and the essence of all things. Brahman is described as being infinite, eternal, unchanging, and non-dual.