through the language of his gaze

The jnana-Guru actually abides as both the Atma-swarupa and the Siva-swarupa within the hearts of devotees, although in their externalised view he appears and moves around as if he is different [from them]. True jnana will not dawn for anyone who has not known experientially, through investigation in the heart, the essence of the upadesa "You are That" which [the Guru] silently and unceasingly conveys to his devotees through the language of his gaze.

~ Guru Vachaka Kovai