The term paduka is total identity and union of prakasa and vimarsa principle at Sahasrara.
In Srividya, Siva is called Prakasa and Sakti is called Vimarsa. This Prakasa is represented as Ha whereas Vimarsa is represented as Sa. This Paduka is contemplated at Sahasrara Chakra as *Hamsa*principle among 8-petalled lotus.
All this is present in Sahasrara amidst Sudha Sagara (Milky Ocean in our mythological stories).
The principle that joins the Siva Kala *Ha* and Sakti kala *Sa* is called MUKA AKSHARA which is denoted by BINDU (o).
So, Prakasa-Bindu-Vimarsa all three combined becomes Ha-M-Sa. These three combined are called Pathi-Pasa-Pasu,Nada-Bindu-Kala, Soma-Surya-Agni Mandala, Sukla-Misra-Raktha Bindu. This Pathi-Pasa-Pasu is also established by Tat-Asi-Tvam which is Tat Tvam As mahavakya which is initiated by Adi Guru Dakshinamurthy.
The jivas who abide in Turiya avastha, contemplating on this Muka Akshara become Parama Hamsas, Avadhutas. Only such persons are addressed as *Paramahamsa Parivrajakacharya*.
Unfortunately, this title is suffixed to every sanyasis now-a-days.
Having been initiated in Srividya Mahamantra, as the intensity of sadhana increases, the Jiva identifies himself with Chitkala rupa Devi. Different subtle stages of Consciousness are experienced when this *Hamsa* gets tilted towards each petal of 8-petalled lotus.
Maha Nirvana is not attained unless this Muka Akshara (o) is not dissolved.
The Jiva when leaves this Muka Akshara dissolves into GREAT SILENCE. This GREAT SILENCE is also called MAHA SHUNYA. Though there are different stages of Shunya or Void, it is difference in the Bhavana or Perception only.
Adi Guru Dakshinamurthy is ONLY KNOWN THROUGH THIS GREAT SILENCE and hence he is called *Mouna Vyaakhya Prakatitha Parabrahma Tattva Yuvanam*. And hence, for this Supreme form of Srividya called Shodasi and Mahashodasi, Dakshinamurthy is the Rishi or Seer.