It is said that excess of everything is bad , and it also correct that paucity in any thing is much bad and dangerous . A doctor ,a physician ,a philosopher , an advocate ,a teacher ,or a scientist , need perfect knowledge in their jobs. If a doctor has no perfect knowledge of diagnosing treatment for a patient , it is sure that the disease will be complicated and danger of life can not be overlooked. In the same way ,if a teacher has no perfect knowledge of teaching and lake of qualification then the whole nation will sink in the darkness of illiteracy and downfall. Every kind of knowledge is beneficial if it is correctly dosed. So one should take special care in acquiring perfect and complete knowledge whether they are technical ,theoretical or practical , without it one can not be perfect man for his job . In present days it is seen that many jobs and posts are filled by such unqualified persons who are totally ignored of the A B C of the job . The main r