Knowledge is like ocean which sees no limits. No matter how much time of life is spent on achieving it whole by a man, it can’t be done. Even its large, multidimentional scope could not possibly be limited. Hence show-off of superficiality and pretense manifested by many a man to become perfect, complete and mastered, Which results in problems not only for him but also for others.
Logically enough, an unskilled, inexpert and amateur person is cause of problem because, if it is taken for example, a novice pilot is given control of a plane, then it is surety that he would not be able to navigate and land the plane safely and might crash it too. In that case that incident would cost lives of passengers traveling along with him. So is case in car driving, unlearned driver is not aware of rules of driving thus would bump car into something or other. In the same way, if a fake doctor prescribe someone medicines of his own choice, then that could prove mortal for patient, cure instead. It is now a common practice that untrained, unqualified persons are calling themselves as mechanics and are repairing vehicles by conning unknowing people. Therefore there is no surety of such vehicles that how long these will run in good condition.
It is popular saying in English ‘To err is human’ that indicates no man is perfect in his doing he is liable to make mistakes in everything. In this connection, Newton, who was inventor of many things and who knew much said humbly that he was like a child picking up pebbles on shore, while vast ocean of knowledge laid unexplored before him.
In a nutshell, it is man who is born with no knowledge, gradually he gets knowledge to make himself perfect, although a complete knowledge is not accomplished, hence the desire of getting complete knowledge never fulfills and pursuit of knowledge never comes to an end.

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Do not do evil to those who do evil to you, but you deal with them forgiveness and kindness.