BG Chap 12 - Kṛṣṇa 's reply to Arjuna's question on the best knowers of yoga

Kṛṣṇa said that those who absorb their minds on His personal form, who constantly desire to associate with Him, and who worship Him with great faith that is beyond the guṇas are considered by Him to be most perfect. Faith directed toward spiritual life is sattva, faith rooted in fruitive work is rajas, and faith residing in irreligious activities is tamas. But faith in devotional service to Kṛṣṇa is purely transcendental. Thus we can infer that bhakti is better than jñāna, and bhakti mixed with jñāna (sattva), karma (rajas) or other processes is inferior to ananya bhakti.

The pure devotees are the best knowers of yoga and they quickly attain the Lord. For one in such Kṛṣṇa consciousness there are no material activities, because everything is done for Kṛṣṇa. A pure devotee is constantly engaged. Sometimes he chants, sometimes he hears or reads books about Kṛṣṇa, or sometimes he cooks prasādam or goes to the marketplace to purchase something for Kṛṣṇa, or sometimes he washes the temple or the dishes—whatever he does, he does not let a single moment pass without devoting his activities to Kṛṣṇa. Such action is in full samādhi. The devotees absorb their minds in Śyāmasundara, having the complexion of a blue lotus, and with a desire for an eternal relationship with Him, worship Him by hearing and other methods.