But why it is most difficult of all things is this, that intellectual realization does not suffice the purpose. It is not learning that is required; it is "being" that is wanted. And when one says, "I want to be filled," one must first be empty. And when one says, "Why am I not filled?" the very reason is that he is not yet empty. If anything keeps us back, it is nothing else. It is not what we possess, or it is not our friends, or those with whom we have any affair, a business, or profession; it is not that. What keeps us back is our self. And to practice this first makes oneself empty, respondent to Murshid.