Logos

Logos (λόγος) is a Greek word that means "word," "speech," "reason." It became a technical term in philosophy beginning with Heraclitus (ca. 535–475 BC), who used the term for a principle of order and knowledge.

H. P. Blavatsky talks about three Logoi: "the unmanifested “Father,” the semi-manifested “Mother” and the Universe, which is the third Logos of our philosophy or Brahmâ."