Why do some people remain the same, while others change?

Yes, many a times, I have observed this in some of my old friends -- whom I have seen right from my childhood, and still seeing them in the same mode when I am 26. They tend to be the same whenever you meet... Full of complaints, furies for others, selfish interests, grudges against others... They have an infinite amount of these problems. To tell you the truth I am in contact with many of such ppl who just try to suck every drop of your Blood Endlessly... So after analysing all this, now I avoid meeting such ppl, and try to confine to myself!!!My Conclusion -- Relatives are by Chance, and Friends are by Choice... So Choose your friends who give you pleasure and happiness!!!:)

the people who change, they change because the become mature, and take responsibilities and understand that how should they be so they change to make them selves better, but some people don't want to change and other's already are quite intelligent and mature.

I have seen so many people who really don't want to change anything on them. They think that we are living with our principle ,attitute , we should not change. IF they are comfortable without amking any changes in their then there is no change required to do in ones life.

well life is full of ups and down, the each moment we live, is about sharing with others and experiencing with our mind and soul. i think some experiences have such a deep impact over us, whether on our mind or in our heart that it forces us to change. dont you think so?