Emperumanar is the one who showed us the Emperuman. Without Emperumanar, we would not have understood Emperuman.
Notes:
This is what Thiruvarangthamudanar also says in Ramanuja Nutrandadi pasuram:
“Manmisai yonigal torum pirandu, engal Madavane
Kannura nirkulum kanagilla ulagorgal ellam
Annal iramanusan vandu tonriya appozhude
Nannaru gyanam talaikkondu naranarkayinare”