What is the truth and why are we called to search for the truth?  That is a mystery.  Aldous Huxley wrote that what us makes human is growing up in a human culture and by the time we are conscious (in our teens) we are enculturated to the culture, usually unconsciously.  We take this for granted and this becomes the truth to us.

So many of us never question this process and just assume that this is the way it is.  We go through life just accepting the consensus.  A few are called to question this consensus reality and become curious and begin the lifelong process of searching for the truth. .  I like the way Joseph Campbell describes this process as a "call to adventure."  We leave the familiar to seek the unknown.  There is a crack in our cosmic egg and this gives us energy to seek alternatives and question the known.