It was the Lord who instructed Brahmā in Vedic knowledge. That Personality of Godhead has to be obeyed in all respects. Anyone who wants to become freed from material entanglement must surrender unto Him, and this is confirmed in Bhagavad-gītā.
Unless one surrenders unto the lotus feet of the Personality of Godhead, it is certain that one will be bewildered, even if he happens to be a great mind. Only when great minds surrender unto the lotus feet of Vāsudeva and know fully that Vāsudeva is the cause of all causes, as confirmed in Bhagavad-gītā (7.19), can they become mahātmās, or truly broad-minded.