Mahat

Mahat (महत्) is a Sanskrit term (from maha, "great") frequently translated as "the great principle." It refers to the universal mind and in Hinduism is the first principle evolved out of the union of purusha and prakriti.

In Theosophy mahat is the universal intelligence, which is not eternal, but limited by the duration of the manvantara. It is the Third (or manifested) Logos:

Mahat, in the Esoteric interpretations, is in reality the Third Logos or the Synthesis of the Seven creative rays, the Seven Logoi.