In order for the disciple to increase his attachment and relationship to the spiritual master the disciple must be eager to hear his spiritual master's instructions as given in his lectures and books. The spiritual master is present in his instructions, and the more the disciple remembers these instructions in his day-to-day life, the more the disciple will feel the constant presence of the spiritual master on the spiritual platform.
(Collected Letters to My Disciples, Vol 3, Pg 93, 2nd Paragraph)