mayy avesya mano ye mam
te me yuktatama matah
The Supreme Personality of Godhead said: Those who fix their minds on My personal form and are always engaged in worshiping Me with great and transcendental faith are considered by Me to be most perfect.
Commentary by Srila Prabhupada
In answer to Arjuna’s question, Krishna clearly says that he who concentrates upon His personal form and who worships Him with faith and devotion is to be considered most perfect in yoga. For one in such Krishna consciousness there are no material activities, because everything is done for Krishna. A pure devotee is constantly engaged. Sometimes he chants, sometimes he hears or reads books about Krishna, or sometimes he cooks prasadam or goes to the marketplace to purchase something for Krishna, 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 Krishna. Such action is in full samadhi.
Commentary by Sri Visvanatha Cakravarti Thakur
Among them, my devotees are the best. Those who absorb their minds in me, Syamasundara, those who desire to be constantly united with me (nitya yukta), with faith which is beyond the gunas (paraya sraddhaya), they, my ananya bhaktas, are the best knowers of yoga (yuktatama). Concerning faith it is said:
sattviky adhyatmiki sraddha karma-sraddha tu rajasi tamasy adharme ya sraddha mat-sevayam tu nirguna
Faith directed toward spiritual life is in the mode of goodness, faith rooted in fruitive work is in the mode of passion, faith residing in irreligious activities is in the mode of ignorance, but faith in My devotional service is purely transcendental. SB 11.25.27
From this it should be inferred that inferior to these ananya bhaktas are those having bhakti mixed with jnana, karma or other processes, who are called yoga vittara. Thus, it is shown here that bhakti is better than jnana, and among the types of bhakti, ananya bhakti is the best.