Do we really have a need to know or a need to prove our points of view? What role plays ego, vanity and narcissism in this light?
I think that we have a need to know. Knowledge is power, but more important than knowledge is the power gained by confirmation of our view of reality. Thus we have a horde mentality, you know, when individuals like to make clans. It is not anything unusual, it gives a sense of security, acceptance and power. Truth is hard to grasp, on the other hand since it is hard to grasp a much easier shortcut to feeling of stability security and power is through associating with fellow clan members and confirming your own points. Everybody likes it, myself included.
So how do we grow? If everybody would just confirm everything you say that would be pretty dull. So we need a tension, but the tension comes naturally since there are no two individuals with exactly the same view of reality, and when a view of reality is challenged a defense mechanism starts. Here we have one intersting thing. We may divide people here. There are those who like logic and truth and seeking the truth the hard way, and then there are those who stick with the clan and just fogging things evading the truth. Ego, vanitiy and narcissism is satisfied. The beast is fed. The problem is that those who seek harder rarely know if they are right. They doubt themselves, groving insecure because no one supports them since they break the dogma of the clan and the ego suffers. So what is better?