Unai yaar arivar Arunachala
Arunachala! You who are shining as the meaning of Omkara, the sound of Om, without equal or peers, who can understand you as you are?
Omkaram is Ishwara (Lord)’s sound-form. It’s plenary, peerless, and beyond the reach of thought and word.
[*Note: Avvayar, the great saint also refers to this in her Vinayagar Agaval: ‘… vaakum manamum illa mano layam meaing the state in which there are no thoughts or words.] This form cannot be grasped by any means other than self-enquiry and total surrender. Nor can it be pointed out. It can be realised only in that peaceful , transcendental (aparoksham means invisible, not perceptible, transcendental) state where there is no body or self consciousness (jiva bodham). Bhagavan asks who has the skill or bravery (thiRam and Theeram where thiRam means skill or talent and Theeram means daring or bravery, a warrior like quality)?
That place where no word or thought can enter is where the realisation experience is. All mantras have a form/Murthy except Om. The sound itself is the form. Similarly the lingam is the formlessness in form or it’s the form of the formless. Lingam literally means symbol. From this we understand: among mantras that have no form is Om, among forms that have no form, is the Siva lingam. They both are venerated/celebrated because of their formlessness.