Tantra Sāra 1.004
स विश्वतैजसप्राज्ञतुरीयात्मान्तरात्मनाम्। परमात्मज्ञानात्मयुजां मद्रूपाणां च वाचकः ॥४॥
They convey correspondingly the following forms of mine: Vishwa i.e. universe, taijasa i.e. vigour, prājna i.e. wisdom, turiya i.e. 4th state that is beyond awake, dream and sleep, ātma i.e. the essence, antarātma i.e. inner essence, paramatma i.e. supreme soul, and jnānātma i.e. root of intelligence.
A pictorial reprasentation of how everything is derived from the Pranava, 'Om':
