the Heresiarich, a Gnostic philosopher, lived in the second century. From his frequently employing forms from the Aramaean liturgy, Neander infers that he was born in Palestine. Yet Jerome holds that he was an Egyptian, a supposition confirmed in a great measure by the fact that he was a disciple of Valentine. According to Irenaeus and other fathers, he was systematically addicted to licentiousness. Concerning his life nothing further is known. "Marcus set forth his system in a poem, in which he introduced the divine Æons discoursing in liturgical forms, and with gorgeous symbols of worship. After the fashion of the Jewish Cabala, he discovered special mysteries in the numbers and positions of letters. The idea of a λόγος τοῦ ἀνθρώπου, of a word manifesting the hidden divine essence in the creation, was spread out by him into the most subtle details; the entire creation being, in his view, a continuous utterance of the ineffable." (Neander's Church Hist., sect. iv.) The followers of Marcus were called Marcosians.