Ishwar Nirnaya

The Ancient Vedas have an agnostic view on God in its certain sections .The Nasadiya Sukta of the Rigveda explains a sceptical idea on the Supreme Spirit .The Bhagavata Purana is the authentic puranic text which accepts the idea of a worshipful God from beginning to the end of the holy text ;Hence the Bhakti Saints and philosophers have accepted this Puran as a supreme authentication on the topic of a personal deity . Based on the Principles of Bhagavata, Sri MadhavDeva  (16th CE) composed Ishwar Nirnaya ,also he included Slokas from Brahm Purana & Vishnu Puran in support of his rhythmic meter .This devotional poem  is encoded in the book of Namghosa by Madhavdeva. Here’s a brief description & translation of the meter -

Krishna ek devo dukhohari    kal mayadiru adhikari

Krishna bine srestha Deva nahi nahi aar

Sristi sthiti antakari Deva          tanta bine
      aan nahi keva

Janiba Vishnu se samasta jagate saar

This verse is based on the quotations from Brahma Puran 49.69 ,which means There’s only one Divine being who is the annihilator of the threefold miseries ; He is also the Lord of illusion & denouement of the matter i.e matter & illusion can’t bind him. Hence, there’s no other Deva than Sri Krishna himself . There’s no other entity than Him as the Lord of creation ,maintenance & dissolution .Know that Vishnu is the abstract of the entire material creation .

Namo Namo Nitya niranjan  Narayana Siva sanatana

Anadi ananta nirgun gunaniyanta

Parama purusha bhagvanta    nahi purbapara adi anta

Tumise chaitanya samaste bhavbhawanta

Salutations to Nitya(eternal),Niranjan(spotless),Narayana( slumber on the celestial water),Siva(Auspicious),Sanatana(Eternal),Anandi(having no beginning),Ananta(Infinite),Nirgun(devoid of three gunas),Gunaniyanta( prime mover of the three gunas). There’s no beginning nor end of Him, there’s no one before Him nor After Him; the great being bhagavan(possessor of the sixteen attributes in fullest), i Adore Him .You are the Consciousness , instigator of gist .

Brahma Mahadeva Laxmi Devi        kaya vakya mane thir kari

Parama anade charana sevante jar

Sada janma jara mrityuhin                Srimanta sundar gunanidhi

Vishnut binae kun Dev ase aar

Whose lotus feet is worshiped blissfully by Brahma,Shiva & Goddess of Fortune herself through their mind,speech & body ;there’s no beginning nor end for Him, possessor of beautiful attributes , the supreme wealthy ; there’s no other being than Sri Vishnu .

Jaar  paddoke Devi Ganga    jar vakye huya ase Veda

Parama patitu taraye jahar name

Sristhi sthiti pralayar jitu      parama karana Narayana

Heno Ishwarak nabhajaye kun kame

From the Water which cleans His Holy Feet comes River Ganges  ; from His speech,comes the Vedas . Even a vile sinner is also saved by uttering Whose Holy Name ; who is the ultimate cause of Creation,maintenance & annihilation of material phenomenon is that Narayana , why not worship such supreme being (or being blind by lust or desire , you are not worshiping Him !)
Similar verses are found in Narayan atharvasirsam too ,Narayana pravartante Naryane pralayante

Apara sansara sindhu aar        Vishnuse param par jata

Par ase tate paramparatma rupe

Tente tumi jana Brahmapar    parparabhuta jata par

Tasambara par Vishnuse par svarupe

This verse is based on Vishnu Puran 1.15.55 : There’s no end to this ocean of worldly misery (or circle of birth & death) , but Vishnu is the shore of that ocean ,in form of paramatma the ultimate spirit . So know that starting from Brahma to all par and apars spirits ,the liberated too , for all of them the shore is Vishnu only .(or for those hankering after liberation & seeking paramatma aspect of philosophy, Vishnu is the Shore for them too).