"As the moon derives its light from the sun, so other holy places shall derive their sanctity from Arunachala. This is the only place where I [Siva] have taken this form for the benefit of those who wish to worship me and obtain illumination. Arunachala is OM itself. I will appear on the summit of this hill every year at Kartikai in the form of a peace-giving beacon."

This refers not only to the sanctity of Arunachala itself but also to the pre-eminence of the doctrine of advaita  and the path of Self-enquiry of which Arunachala is the centre.

One can understand this meaning in Sri Bhagavan's saying, "In the end everyone must come to Arunachala.".

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