Nadi (meaning "flow") are the channels through which, in traditional Indian medicine and spiritual science, the energies of the subtle body are said to flow. They connect at special points of intensity called chakras. Nadis seem to correspond to the meridians of traditional Chinese medicine.

Nadis are thought to carry a life force energy known as prana in Sanskrit, or qi in Chinese-based systems. In particular prana (active) is supposed to circulate inside Pingala, while apana (passive) is supposed to circulate inside Ida. Inside Sushumna is supposed to circulate kundalini when awakened.

Kundalini

The kundalini represents the latent potential in man and is generally regarded as residing in the mooladhara chakra.This implies that man has a unique faculty of self-awareness and understanding that normally remains untapped and unused.  Man rarely uses even a fraction of his potential.  This is the realized meaning behind the symbology of the kundalini residing at the base.

Religious and traditional aspects

In the ancient scripture called the Satapatha Brahmana it is written: “Prana is the body of the Self (supreme consciousness).”  Many say this is the same equivalent referred to in the Christian teachings as the Holy Spirit.  In other words, prana is the vehicle or the medium of consciousness.  In this sense prana can be equated with the Hindu concept of prakriti, meaning the manifest constituents of the universe in the form of matter and energy.

Adam & Eve: Degrees of Separation?

This is the level of awareness that is symbolized by the Biblical story of Adam and Eve after they ate the forbidden fruit in the Garden of Eden.