Association is very important. It acts just like a crystal stone, which will reflect anything which is put before it.
Nectar of Devotion, Chapter 12,
Elevation is possible in Krishna Consciousness in the association of pure devotees who can deliver one from delusion.
In Chaitanya Caritamrta Lord Caitanya says that sadhu-sanga, the association of a great saintly person, is very important, because even if one is not advanced in knowledge, simply by association with a great saintly person one can immediately make considerable advancement in spiritual life.
A devotee should always aspire to live in the association of advanced devotees and engage in the service of the Lord through the parampara system.
An intelligent person should reject all bad association and instead take up the association of saintly devotees, whose words cut off the excessive attachment of one's mind.