Sufi emperor dewanbagi.

Human being commits sin being instigated by satanic impulses.And for these sinful acts a dark line creates in the distant chamber of his spiritual heart.And right then a kind of detachment originates between the Creator and creations.In this circumstances that detachment can be alleviatedonly by the remembrance in the name of Allah in heart.In course of time the dark shroud in heart removes by the effects of the dhikr (remembrance of Allah) and gradually the distant chamber of spiritual heart opens.This is the secret about opening thedistant chamber of spiritual heart.Acquiring knowledge has been stated as obligatory by the Prophet(sm) even if migration to China is needed for it.Now it is to be realised which knowledge is it!The Prophet(sm) hasn't made anything obligatory for His disciples what Hedidn't practise Himself.He certainly meant to say about knowledge regarding Tasauf.In those days migration from Arab to China was inconceivably troublesome.And if knowledge regarding Tasauf was possible to be acquired from books,migration to China wasn't supposed.Thatis to say, getting used to practising Tasauf is a must even though it is of great suffering.