One should not keep a superficial relationship with the spiritual master. Personal association certainly helps; but hearing from the spiritual master builds the foundation for the personal association. I am therefore making every effort to increase my availability to my disciples by providing recorded material and written material for this association—especially considering that it is becoming increasingly more difficult for me to maintain such a rigorous traveling schedule as I have been accustomed to for the last 15 years.
(Collected Letters to My Disciples, Vol 3, Pg 99 3rd Paragraph)