Satsang

Sri Ramana Maharshi

Satsang means association with "sat" or Reality. One who knows or has realized "Sat" is also regarded as "Sat". Such association is absolutely necessary for all. Sankara has said, "In all the three worlds there is no boat like satsang to carry one safely across the ocean of births and deaths." 

Guru not being physical, His contact will continue after His form vanishes. If one jnani exists in the world, His influence will be felt by or benefit all people in the world, and not simply His immediate disciples.