Bhagavad Gita -Sri Madhvacharya
(Bhashya and Tatparya Nirnaya)
For the sake of showing that complete deliverance is possible only through complete Wisdom of His essence and not by knowing it partially. Whoever; knowing all the principles mentioned in Vedas, adores Me always, for him alone do I show Myself: not for others, thus, in Maha Kurma Puraana. Only if one knows in this manner, there would be no re-birth, thus the words mentioned here should be understood. Due to the use of the words there is no other way, which shows that never for others would the Lord will be seen. The adjective tatvatah shows that entirety of Wisdom is essential and where it is used thus, there it would not be contradictory. A human being will not know by understanding a single principle without first knowing the entirety of the principles. Even the great god, Indra would not be capable; therefore one should endeavour to know all the principles, thus in Skanda Purana.