He does not know and does not need to know the various personal problems of disciples as and when each one arises. This is because he does not assume the role of a personal master, hence does not pry into their mental and emotional states. This does not mean that he is not helping them. He does. But he is able to do so without opening the doors of his conscious mind. The subconscious doors are always open and through them there enters each disciple's call and there emerges his response.
-- Notebooks Category 12: Reflections > Chapter 2: Philosophy and Contemporary Culture > # 84