Knowledge means to know that I am helpless in this world and only the power of God can save me.
Bhagavad Gita is directly imparted by Krishna and if we accept Bhagavad Gita as it is, we are full of knowledge.
Lecture on Srimad Bhagavatam 12.2.1
San Francisco, March 18, 1968
Vedanta means ultimate knowledge. Knowledge is never perfect unless one comes to the point of understanding Krishna. To remain in Krishna Consciousness is actual understanding of Vedanta.
Letter to Janardana — Los Angeles 21 January, 1968,
Real knowledge is expounded in Bhagavad-gita: “Just become Krishna conscious. Just worship Krishna and become a devotee of Krishna.”
Srimad Bhagavatam 3.24.18,