I read in an answer, that Shripaada Ramanujacharya and his disciples proved the Supremacy of Shri Vishnu using the Vedas, Upanishads, Smritis, Puraanas and other texts. Also, Shripaada Ramanujacharya says in his Brahma Sutra Bhaashya, that the Veda declares Naaraayana to be Brahman. My question is:
- Does only the main Vedic literature (Veda Samhitas, Braahmanas and Upanishads) provide sufficient proof for Vishnu being the ultimate Eeshwara? Can this be done without the involvement of any other Shaastras, such as the Shaiva and Vaishnava aagamas, Ithihaasas or Puraanas?
- How do Vaishnava Aachaaryas, like Shripaada Ramanujacharya or Shripaada Madhvacharya, prove the Supremacy of Vishnu, even when the Vedas say in certain places, that "there is no one mightier than Rudra"?
- I have also heard of a grammatical trick used by Sri Vaishnavas, through which one can use certain names of Shiva to refer to Naaraayana. How is this done and is this interpretation valid as per other Shaastras, such as the Smritis?
Hope to get a proper answer.