When we speak about coming closer to the spiritual master, we do not mean necessarily by physical proximity, but rather through service. This means that we become a more effective instrument in his hands. The spiritual master is interested in preaching, because it is his responsibility to expand the world’s awareness of Krishna’s glories and to give devotional service to others. The disciple who wishes to come closer to him will assist him in his mission. This means that he or she agrees to accept the burden of preaching responsibility so that the spiritual master can more effectively spread Krishna consciousness.
Lectures from a disciple Vol 1, Pg 71, 2nd Paragraph