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,
Purpose of all knowledge is to convince us that we should love God.
Without perfect knowledge, one cannot act perfectly.
Ordinary knowledge obtained by a university education pertains only to matter. Knowledge means knowing the distinction between spirit and matter. In modern education there is no knowledge about spirit; they are simply taking care of the material elements and bodily needs.