According to Christian beliefs, "In the beginning it was the word". Not much unlike this, at the basis of Induist religion we find the aum, or om, the founding mantra of existence, the primitive sound from which everything was generated.
The Celtic triskell symbolizes eternity, through birth, death and rebirth, and the balance between elements.
That´s why their union represents well the idea of essence, of timeless unity and wholeness.
Requested by Francesca.