If we want to experience something we are not currently tasting in spiritual life, it is essential that we associate with real devotees. This is how we cultivate faith. Srila Prabhupada explains that faith is attained in the association of devotees. When we see that others are progressing in Krishna consciousness and becoming advanced, not caring for their personal needs but depending on Krishna, and preaching to others in a selfless way, we can become inspired to follow them. We realize that it is not by seeking our own spiritual satisfaction that we advance but by willingly giving whatever we have to others.
(SB 4.23.12, Kishinyov, June 1996)