While the different schools of Sufism understand all this and use different methods in teaching it, they do not restrict themselves to one particular practice. The Sufi regards practices as prescriptions which are not given indiscriminately to everyone, but are chosen separately, one for this pupil, another for that. These practices are only preparations for receiving the truth. There is no such thing as giving truth to one person, and then his giving it to another, for truth by its very nature cannot be uttered, cannot be given. One cannot give that which cannot be put into speech. So the teacher gives a method for finding the truth, for unfolding it, for unlocking that which seems to be in one's heart. No real teacher, no true mystic, has ever claimed to be able to give one anything like this. It is clearly impossible for anyone to impart his knowledge to another person; he can only show him how to unfold his own knowledge to himself. Everybody possesses a kingdom, but he has to find it. The seeker will find it easy to discover the truth when he has the help of someone who himself has trodden the path towards it.