Quotes:Karana Sarira

H. P. Blavatsky

Kârana Sarîra. The “Causal body”. It is dual in its meaning. Exoterically, it is Avidya, ignorance, or that which is the cause of the evolution of a human ego and its reincarnation ; hence the lower Manas esoterically — the causal body or Kâranopadhi stands in the Taraka Raja yoga as corresponding to Buddhi and the Higher “ Manas,” or Spiritual Soul.

Source: H. P. Blavatsky, The Theosophical Glossary, art. Karana Sarira