Re: Visistadvaita before Ramanuja
There is a reason why nAthamuni and others' works are lost. In the 1300s, muslims invaded srirangam and my acharyas did whatever they could to save the precious works from them. SrI pillai lOkAchAryA protected Namperumal (Bhagavan), whereas vedAnta desikA saved the SrI bhAshya. If it wasn't for the courage and devotion of these great achAryAs, much damage would have been inflicted on sri vaishnava/vishishtadvaita siddhAnthA. The places where these achAryAs hid can be visited today - satyagalam forest near melkote for a temple of vedAnta desika and jyotishkudi for a temple of pillai lOkAchAryA in madurai.
During this invasion, works of nAthamuni like yoga rahasyam and yAmuna muni's 'mAyavAda khAndaNam' (one of the earliest attacks on advaita and used by rAmAnuja muni as a base for his arguments in sri bhAshya) were lost.
I would recommend anyone who wants to know more about Vishishtadvaita to read 'yatIndramatadIpika' of srinivAsAchArya, a great achArya who came a bit late.
It lucidly explains my tradition and also is devoid of all the nonsensical '18 differences between vadakalai and thenkalai' (which are the imaginations of later day scholars). SrinivAsAchAryA was a disciple of sholingur mahAchArya, who in turn has written two famous works - chandamArutam, a commentary on vedAnta desikan's sata dhushani and rahasya traya mimAmsa bhAshya, a tikA on the mumukkshupadi commentary of manavAla mAmuni.
[CENTER][COLOR="Black"][COLOR="Red"][COLOR="DarkRed"]No holiness rules over my freedom
No commands from above I obey
I seek the ruin, I shake the worlds
Behold! I am blackest ov the black
Ov khaos I am, the disobediant one
Depraved son who hath dwelt in nothingness
Upon the ninth I fell, from grace up above
To taste this life ov sin, to give birth to the "I"[/COLOR][/COLOR][/COLOR]
[B]~ "Blackest Ov the Black" - Behemoth.[/B]