By studying Vedanta philosophy one must come to know the Supreme Person. Whoever describes Vedic knowledge as impersonal is a demon. One becomes successful in life by worshiping the form of the Lord. The Mayavadi sannyasis deny the form of the Lord, which delivers all fallen souls. Indeed, the Mayavadi demons try to cut this form to pieces.
From Srila Prabhupada’s purport to Cc Madhya 17.104