"(The Supreme Personality of Godhead, Kṛṣṇa, said:) "My dear Uddhava, neither through aṣṭāṅga-yoga (the mystic yoga system to control the senses), nor through impersonal monism or an analytical study of the Absolute Truth, nor through study of the Vedas, nor through austerities, charity or acceptance of sannyāsa can one satisfy Me as much as by developing unalloyed devotional service unto Me.""
Karmīs, jñānīs, yogīs, tapasvīs and students of Vedic literature who do not have Kṛṣṇa consciousness simply beat around the bush and do not get any final profit because they have no clear knowledge of the Supreme Personality of Godhead. Nor do they have faith in approaching Him by discharging devotional service, although everywhere such service is repeatedly emphasized, as it is in this verse from Śrīmad-Bhāgavatam (11.14.20).