Thus understanding does not depend upon the head; it depends upon the heart. By the help of the head one can make it more clear, it becomes intelligible and one can express it better. But to begin with it must come from the heart, not from the head. Besides a person who only uses his head says, 'It must be so because I think it is so', whereas the person who has the heart quality says, 'It is so because I believe it to be so'. That is the difference. In one person there is a doubt, in the other there is conviction.