Madhvaon Brahma Sūtra 3.2.17

Further the following Sruti shows that perfect bliss is the form (as well as the essence of the Lord); “ By means of superior knowledge, the wise see that Brahman which (is immortal and) shines everywhere, consisting of bliss (both in essence and in form)” (Ath. U. II. 2. 8) ; and in the Matsya Purana the Smriti shows that the Lord’s form consists of intelligence (knowledge) thus: “ The ascetic should contemplate the Lord Vasudeva, who is like pure crystal and free from all defects, as the Supreme Lord, for the purpose of increasing knowledge ; he should not contemplate (as the Lord) any other than Vasudeva whose Self consists of (pure) wisdom.”