What then is anahata?

The Bible calls it 'the Word' that existed before the creation of universes and was the creative force for everything that came into the realm of manifestation. Indeed, the Gospel of John, in the new testament, identifies it with God. The Vedas and Upanishadas call it Om , nada, shabda, mukhya prana ( the chief vital energy) and udgitha ( sound from above). Sufis and Muslim mystics call it 'qalma' or 'bang-i-illahi' ( voice of God). Nanak calls it 'shabad' or 'satnam' ( the true name). Greek mystics call it 'logos'. Elsewhere, it is referred as 'the comforter' and 'the Tao'. The anahata means 'the unstruck' Nada means sound or 'audible vibration.' The literal meaning of 'anahata nada' is the unstruck vibration.' All physical sounds are prouced by striking two objects against each other. For example air strikes the vocal chords to produce speech and drums are beaten by hand. Different from all physical sounds is the unstruck melody of divinity which is acausal and not the result of any gross(physical), subtle(mental) or causal action. A phrase which would enlighten its meaning a bit is 'audible wave of consciousness.It is the bridge between individuated consciousness and 'pure bliss of being.' Practice of 'anahata nada', otherwise known as 'Surat shabda yoga' ( union of individuated consciousness and audible life stream ) and 'yoga of sound and light' begins when the meditator can clearly hear the inner sound current which appears as an audible vibration somewhat resembling buzzing bees, flute, harp, gong-bells and a roaring ocean in progressively expanding spheres of consciousness.