SB 4.31.28
imam tu kausaravinopavarnitam
ksatta nisamyajita-vada-sat-katham
pravrddha-bhavo ’sru-kalakulo muner
dadhara murdhna caranam hrda hareh
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
My dear King, in this way, after hearing the transcendental messages of the Supreme Personality of Godhead and His devotees from the great sage Maitreya, Vidura was overwhelmed with ecstasy. With tears in his eyes, he immediately fell down at the lotus feet of his guru, his spiritual master. He then fixed the Supreme Personality of Godhead within the core of his heart.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
This is a sign of associating with great devotees. A devotee takes instructions from a liberated soul and is thus overwhelmed by ecstasy from transcendental pleasure. As stated by Prahlada Maharaja:
naisam matis tavad urukramanghrim
sprsaty anarthapagamo yad-arthah
mahiyasam pada-rajo-’bhisekam
niskiñcananam na vrnita yavat
(Bhag. 7.5.32)
One cannot become a perfect devotee of the Lord without having touched the lotus feet of a great devotee. One who has nothing to do with this material world is called niskiñcana. The process of self-realization and the path home, back to Godhead, means surrendering to the bona fide spiritual master and taking the dust of his lotus feet on one’s head. Thus one advances on the path of transcendental realization. Vidura had this relationship with Maitreya, and he attained the results.