Our Sampradhayam is called Ubhaya Vedantha GuruParamParai(both Sanskrit and tamil Thiratu in Manipravalam Language).Our Sampradhayam is well known flourished and given by our great PurvaAcharyas , starting from our beloved Alzhwars , Swami Nathamunigal and to our swami ManavalaMamunigal. Among these great PurvaAcharyas Paramparai descendent, our swami  Pillai

UllagaA Siriyan (Swami Pillai Lokachariyaar) and Our Visadavak sikamani (Swami ManavalaMamunigal) are responsible for flourishing (and pillars like) for our Sampradhayam.

If we wouldn't have both the above great acharyas, then this world would be in complete DARK. If we wouldn't have our beloved Acharyan Visadavak Sikamani, then our 

There are only two types of Acharyas:

1)Anuvirudhi PrasaannaAcharyargal: 

2) KribhaaMaathra PrasaannaAcharyargal:

When Acharya sees their Sishya , who is depressed and in the state starving for Athma Guna Purthi. By seeing this Disciple's sorrow,then this Acharya would then take the responsibility to  take care of Sishya's Atma guna poorthi. They are called AnuVirudhi Prasaanna Acharyargal.

 Whereas Acharya will not even think or consider any return back from Sishya and out of their greatness and graceness for their sishya, if they  look always Sishya’s Atma Guna Poorthi(Nayanam) by their own nature. They are called KribhaaMaathra PrasaannaAcharyargal.

Like our great “Mathurakavi Alzhwar” in “Kanninum Siruthambhu..towards NaamAlzhwar..

i)Payanan Raakilum paankala raakilum 

ii) Also like how KoorathaAlzhwan was requesting Devaraja Perumal to give Mooksham for NaluRaaan Pillan even though NaluRaan was responsible for having Alzhwan to lose  his eyes.

In our great PurvaAcharyargal descendents, even though our beloved Swami Emberumaanar is well known considered to be “KribhaaMaathra PrasaannaAcharyar”, we were very unfortunate to get even a single Sampradhaya RakshyaArtha Grantham from our beloved Swami Emberumaanar. Swami would have shown some mercy on us to give any Sampradhya RakshyaArtha Grantham, but we were unfortunate to see any.

So our  beloved Swami Ramanujar  itself came to us here as Swami ManavalaMamunigal and showered the greatness and blessings  on us with all the commentaries for our Sampradhaya RakshyaArtha Grantham with all Pramana thiratugal. Swami ManavalaMamunigal given all the above Rakshyaartha Grantham like the mother feeding her child with ghee and milk.

Our Swami Manavaala Maamunigal was born in the Dvayam, was reared on the Dvayam, and remained firmly rooted  in the Dvayam. We don’t even know how to ? and if any then we don’t know whether how to express and praise  swamis greatness or swami’s all Kalyana Gunas. Our swami's SriSukthigal and his Grantham are beautifully given and arranged and its the  only greatest wealth now for all of us.

Out of Swamy's all grandhams, 1)"SriVachanaBhushanam",2) Thatvatrayam 3)Mumukshuppadi,the essential knowledge of anyseeker of moksha 4) Acharya Hirudhayam ,  are the four well known great grandhams for our Sampradhayam.

Swami has given an excellent, great commentaries for the above granthams,it is noticed and known by everyone that swami got a name called "Visadavak sikamani ". Our swami's SriSukthigal and his Grandham are beautifully given and arranged with simple padam(words) in all swamis SriSukthi for everyone to understand and follow easily.

This is the excellent example given by our Sri U.Ve PBA swamy for Manavala Mamunigal  greatness on swami's EEdu VyaKyaNam:

Sloka from Ramanyanam:

Abtheer Lankitha AVa VaaNaraPAdai: Kinthvasiya KambhiThaaram Aabhathaala|

NimaanaPiVarathanur Janathi MAnthaaSala:||

Sloka Meaning:

Even though all Vanavara veerargal(vanvaragal) had  realized and crossed the bridge successfully, however they themselves didn't exactly know the depth of the ocean and how it was. So the depth and the ocean waves are only measured to be known by the MAnthra Mountain (manthra malaigai) that present inside the deep ocean, rooted from the ground in that ocean).

Likewise, with all our great PurvaAcharyas with all NAyana  in our GuruParamparai, Swami ManavalaMamunigal is considered to be that Manthra mountain whereas all our other acharyas are Vanavara veeragal. Because Our beloved Acharyan was given this great Eedu after swami experienced the completed depth on that. That is our beloved Acharyan greatness.

Swami ManavAla mAmunigal is dearly known as Azhagiya ManavAla MAmuni, Jeeyar, Periya Jeeyar, Vara vara muni. But our beloved Acharyan has one special name which no other AcharyA received, even though they all qualify for the same. It is Yathindra Pravanar. Many stalwart AcharyAs such Swami EmbAr,  Swami  KoorathAlvan, Swami MudhaliyAndan, Swami Bhattar, Swami Nanjeeyar, Swami Nampillai,  Swami Periya VAchan Pillai,  all have all shown great Acharya Prati-Bhakti towards EmberumAnAr(our Beloved Swami Ramanuja) but none received this great honor.

Even though Periya Jeeyar himself is punar avatAram of Swamy EmberumAnAr, Swamy always showed so much humility and always presented himself with all great Kalyan Gunas. Likewise, we can easily observes that  our beloved Periya Jeeyar in his YatirAja Vimsati accepts all NaichyaNa bhAvam of all our pUrvAchAryAs such as Alavandar, KoorathAlvAn, Bhattar on himself eventhough he does not have to do it. It is only Swamis  humility and great Kalyana Guanas and always towards our beloved Emberumaanaar.

The other great honor which no other AchAryA received is the well known thaniyan presented by Lord
RanganAtha himself and completing the AchAryA rathnamalai for our Sampradhayam.

Even Swamy EmberumAnAr himself did not receive that honor. Every AchAryA appears for a specific purpose. Our Swami AlavandAr appears to begin the tradition of Stotrams and explaining the vedAnta. Our Beloved ParamaAcharyan EmberumAnar appears to establish the Sri Vaishnava Siddhantha dharsanam completely.

Our great SwamiBhattar appears to establish Sri Rangam's  and his SriSukthis speciality. Our Beloved great vyAkyAna chakraVarthi swami Periya vAchAn pillai appears to write vyAkyAnam for  prabandams. Our beloved  great Pillai UllagaA Siriyan (Swami Pillai Lokachariyaar) Lokacharyar appears to give us RahasyaARtha granthams. This way  Our beloved Acharyan Periya Jeeyar Swami appears to glorify our beloved Swami EmberumAnAr. And EmberumAn(Sri Ranganatha) inturns glorifies Periya Jeeyar by accepting Periya Jeeyar as his AchAryAN and presenting his own sesha paryangam as sambAvanai.

 Our beloved Swami ManavalaMamunigal  would have thought that swami could write many Granthams on his own, but swamy has not done that, he completely reared and  firmly remained and rooted with only all of our great PurvaaAcharya SriSukthis and Granthams.

Like, it is not important to construct and build new temples now, it is more important to maintain, preserve , support and Estabilish the existing temples.

Below is an excellent article by our Sri U.Ve PBA Swamy from his Sri Ramanujan Magazine, Adiyen just tried to translate that above in english.