Being an Introvert is not a shame but...(P-1)

We have been in three types of phases in life Introvert, Extrovert and Ambivalent. Today I am talking about being an Introvert. From my point of view, We are all been through this phase of life or are still in it. So, should I or We feel shame for it, the answer is clear and loud definitely "No". 

  Let me explain this with some rational examples and introduce a prominent personality.

  I thought the one Introvert could be the best assertive communicator. Here I bring Dr. A.P.J Abdul Kalam. Why I chose him, the reason behind that is we are all familiar with him.