Whatever knowledge we acquire should be used in Krishna consciousness.
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,
For advancement of material knowledge there is a need for personal ability and researching aptitude, but in the case of spiritual knowledge, all progress depends more or less on the mercy of the spiritual master. The spiritual master must be satisfied with the disciple. Only then is knowledge automatically manifest before the student of spiritual science.
Knowledge is useless if it doesn’t create remembrance of God.