A little learning is a dangerous thing. (অল্পবিদ্যা ভয়ঙ্করী)

This is true about those who have little knowledge but pose to be learned men and occupy vital positions of the society. The idea here is that shallow knowledge is harmful to the society. A man of little learning who pretends to be a learned man makes shameless publicity of his knowledge and behaves in an unnaturally vain and artificial way to hide his basic weakness. As a result the society is duped and he takes the place of a really knowledgeable person. He then, behaves in an impolite, indolent and hot headed way out of his inferiority complex. This braggart is showy, affected and ridiculous in that place or responsibility. Not only this, because of his lack of knowledge he confuses himself, confuses others, misleads them, makes faults and causes harms to others. The learned men in that case do not get their rightful place and the society is deprived of their service. The learned men as opposed to these self made clowns know what to do and how to do. They behave soundly. Their depth speaks of their ability and strength. They are not showy or conceited. On the contrary, a man of little learning can be dangerous. For an example, consider the case of a quack who is with scanty knowledge of medicine and disease. He poses to be an eminent doctor evidently to attract client through self-publicity. But what does he do with the patients? He makes wrong diagnosis of them, confuses them gives them wrong treatment and thus sends them to grave. It is the luck of those patients who come out unharmed. So the moral lesson here is that we should not be confused in knowing who is really learned and who is of little learning and then. We should not place the men of shallow learning in places of reponsibility in the society