The Muslims purpose may be to serve Allah, the Christian to serve God (they are the same!).
The parent's purpose may be to see that her children grow into fine adults.
The addicts purpose may be to find his next fix, or to get himself clean.
Politically, conservatives have a purpose, liberals have a different purpose.
A woman's purpose may be to be independent, or to be partnered with someone.
A man may or may not want self sufficiency.
My point is, we all want something different. We all have different perspectives, regardless how large or small those differences may be, they are differences. How then, can we ever hope to see a universal Purpose of Life?
In my life, I had the good fortune to meet and train with the father of American Tae Kwon Do, Grand Master Jhoon Rhee. Master Rhee and I are from different cultural backgrounds, different ethnic groups, and different religious beliefs. However, he taught me the universal purpose of life. The purpose, as he explained it, transcends all of our differences. We ALL have the same purpose.
The Purpose of life is to be Happy.
Simple really. We are supposed to be happy. Whatever we may do, whatever we may say, how ever we may believe, is all done in the pursuit of our happiness.
Can we actually achieve happiness? Who knows? What is important, is that we strive for that happiness.
Of course, we must be careful that the pursuit of our happiness does not infringe on someone else's happiness. Or at least try :-)
Or, I suppose one could follow Emerson:
"The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well."
And, Yes. I am pursuing my own happiness ;-)