Timer,

You said:
Ya, Nepali can be bitter, negative and unappreciated but it has nothing to do with religion. It is more of cultural thing, we have never been taught to say thank you if you are thankful to anyone. We are poor, sometimes we are angry, unhappy and unappreciated.

 I don't understand what you are saying.  Are you saying that Nepalese are bitter, negative and unappreciated because of your culture and poverty? Well what I am saying is that we Christians can help you to improve both. Those Nepalese who have accepted Jesus in their life have seen both those things that you Nepalese struggle with, improve.