1] When the mastercraftsman teaches the students hardly notice his wandering around. The next best teacher is one that the students admire and imitate. After this is the teacher that imposes his authority upon the students, forcing them to become what he believes they should be. The worst is one for whom teaching is only a job. His lack of interest causes the students to feel cheated.
2] The transmission from the mastercraftsman to the student is as delicate as a gossamer thread. If the proper relationship is not established the deepest teachings will not be passed on.
3] The mastercraftsman is subtle in his teaching method. With his harmonious presence and intuitive clarity, He reveals to his students the nature of their own hearts. He nourishes them as they establish themselves in the creative harmony.
 There is a delicacy in friendship, in all kinds of relationship; there is delicacy in meeting people. If that delicate thread is damaged or moved out of place something goes wrong. There is no more delicate machinery than the spirit of man... What happens, very often unconsciously, is that there are friends who are very devoted to each other, and then there is something in the machinery that goes wrong. Perhaps neither of them knows this, but unconsciously the spirit of their friendship is destroyed; and it is most difficult to mend it. Then there is no joy of friendship any more. Friendship lasts only as long as that delicate thread exists, as long as the machinery is in proper order.
Hazrat Inayat Khan, The Tuning of the Spirit
Johannes Itten, Design and Form - The Basic Course at the Bauhaus, 1964
Hazrat Inayat Khan, Four Kinds of Discipleship