As to spiritual attainment, it is something that we can never absorb through the head; it can only be received through the heart. Let two persons, one with his heart and the other with his head, listen to the teachings of a teacher. The latter will be thinking, 'Is it so or is it not so?' or, 'How is it, if it is so? How can it be; and if it is, why is it?' And there is never an end to the 'why'. But another person will listen with his heart; and while both logic and reason are at his disposal they are not troubling him. His heart is open, he listens to it; and the quality of the heart is such that whatever falls upon an open heart becomes instantly revealed. When one says, 'I cannot understand you', it is just like saying, 'I have my heart closed to you'; there is no other reason for not understanding another person. But when one can say that one has understood it all, it means one's heart was open; that is the reason why one has understood it.