The relationship between a student and his master is similar to that of the relationship between a blood donor and a blood donee.

As the constitution of the donee’s body expects a blood gourp in harmony with his group of blood. Likewise the thoughts of the master and the student should be in a perfect harmony. If not the student’s mind will reject the lessons of the master like a body rejecting a different group of blood donated to him.

If a person wishes to learn English he cannot / should not seek a science master. It is often said that a student does not / will not have capacity to judge the capabilities of a master. Though it is a fact it needs a minor correction. A master would have learnt a quite a lot of things in a subject, a student being a prospective learner will not even posses a meager portion of that knowledge, but every individual has an inborn intuition, with the help of which one can decide a master with a frequency of thoughts in harmony with him, like deciding a subject and the teacher teaching that subject.