Human is a difficult entity to fathom. I encounter it recently. I know one associate during the full-time employment. It has come to my knowledge that this person turns out to be hostile when I tried to get touch with this person. The purpose of this action is to reminisce the old time. However, this person becomes a totally different person whom I know of and I think that this is the sort of human nature. I believe that it is normal for people to change for the purpose of his/her interest. This is one of the experiences which I gain during the course of the life journey. I think that this is a lesson well learnt without any cost in particularly of the human nature.