Satsang is very much necessary to attain God as Lord Narada says in Bhaktisoothra.
Narada says"Bhakti,the experience of God comes through Satsang. The fruits that one receive from Satsang will never go waste.
Like when one who sits near a garland or flower gets the smell of it similarly in the 'Sangham' of Sadhus the sacred 'smell' of Bhakti will overflow. That will purify the mind.
The mind of a true Bhaktan when he/she in the "Dusangha" (people with bad qualities) will be similar to the state of fish taken out of water.It doesn’t have an existence. The relief it gets when back in water is similar to the case when bhaktan/devotee back to Satsang.
Satsang doesn’t just mean listening to talks or talk between people;smriti or remembrance of God itself is Satsang. In Meditation or Dhyana of the God the mind gets involved (sanga) with the reality or truth(satva ).
