He is called by the learned the invisible cause of all, he knows no deterioration, he is the first Brahma, he is the abode of the three qualities (Satya, Raja and Tama), he is the great soul, he is undeteriorating, he is the first, the cause of the creation, the Nature, the controlling Lord.
अव्यक्तमक्षरं ब्रह्म प्रधानं त्रिगुणात्मकम्। आत्मानमव्ययं चैव प्रकृति प्रभवं प्रभुम्॥