What the Guru can do for the sadhak depends upon the latter’s receptivity—not upon any method or rule of sadhana. Certain psychological conditions or attitudes of the consciousness tend to increase the receptivity—e.g., humility towards the Guru, devotion, obedience, trust, a certain receptive passivity to his influence. The opposite things—independence, a critical attitude, questionings—go the other way and make it necessary for the Guru to help only indirectly or behind the veil. But the main thing is a kind of psychological openness in the consciousness which comes or increases of itself with the help of the will to receive and the right attitude. If there is that then it is not necessary to pull anything from the Guru, only to receive quietly. Pulling from him often draws untruly or things for which the consciousness is not ready to assimilate.
Ref: Letters on Yoga – II