One who is very much proud, however, is unable to surrender either to the spiritual master or to the Supreme Personality of Godhead. Thus he cannot understand the essence of any Vedic literature. Śrīmad-Bhāgavatam (Bhāg. 11.11.18) declares:
na niṣṇāyāt pare yadi
śramas tasya śrama-phalo
hy adhenum iva rakṣataḥ
“If one is learned in Vedic literature but is not a devotee of Lord Viṣṇu, his work is a useless waste of labor, just like the keeping of a cow that does not give milk.”
Anyone who does not follow the surrendering process but is simply interested in an academic career cannot make any advancement. His profit is only his labor for nothing. If one is expert in the study of the Vedas but does not surrender to a spiritual master or Viṣṇu, all his cultivation of knowledge is but a waste of time and labor.
Ref >> Srila Prabhupada Vani.