5. SamSArikaL thankaLaiyum Isvaranaiyum maRanthu Isvara kainkaryaththaiyum izhanthu izhanthOmenkiRa izhavum inRikkE SamSAramAkiRa perunkadalilE vizhunthu nOvupada, SarvEsvaran, than krupaiyAlE, ivarkaL thannai aRinthu karaimaram sErumpadi thAnE sishyanumAy AchAryanumAy ninRu thirumanthraththai veLiyittaruLinAn.
The baddha chetanas who are trapped in this samsaric world, forget that they are dAsas, forget that Sriman Narayana is their Lord (that is they forget that they are the seshas and that He is the seshi), do not live in service of the Lord, are not concerned that they have lost the most valuable thing that they posessed, and stay trapped in this samsaric ocean which is difficult to cross. Seeing this, the Lord out of His kindness (His nirhEduka krupai), in order to make these jIvas know Him and facilitate their crossing samsara and reaching Him, Himself became Nara the disciple and Narayana the acharya and taught the Thirumanthram which is the essence of Artha Panchakam.
Sri PBA Swami's Sarartha Deepikai:
Here the origination of the Thirumanthram is explained to show its greatness. The samsaric chetanas due to association with this prakruti which is timeless get trapped in the endless cycle of birth and death and forget themselves and the Lord. Forgetting themselves is this: all souls are naturally servile to the Supreme Soul; without difference whether they are in this world or the other world their only and true characteristic is that they are enslaved to the Lord; forgetting this fact of their natural servitude to the Lord is forgetting themselves. Forgetting the Lord is this: forgetting His supreme and all encompassing leadership.
Thus forgetting their nature as well as the nature of the Lord they lose the supreme goal of service to Him. Not only do they lose it, they even lose the feeling that they have lost such a valuable thing. Seeing the souls suffer thus and stay trapped in the samsaric ocean, He took great kindness in His divine lotus heart toward them. He thought that they need to know Him so that they can cross this ocean and reach Him. Thus He Himself became Nara the sishya and Narayana the acharya and expositioned that Thirumanthra which holds in it the meaning of all Sastras and which shows clearly the artha panchakam.