where to start theology?

Every theologian starts his/her theology at various points like sin, bible, god etc.
But in later part of 20th century, the motto is changed. people started to say 'theology must started at where the pain is there' so all theology must see in the perspective of the starting point. Feminist theologians tell that we must start with the women oppression because the pain is there.

But the point according to definition is that the real problem is not the oppression or poverty or racism but the root cause of the problems was SIN. So according to my view point, theology must started at the point of Original sin or God, not the context. We must see the context from the eyes of the Bible, not see the Bible form the point of our context. I remember G.K.Chesterton's Orthodoxy, where he starts with the illustration that he try to search new place but end up with the old place. Like that we all ways try to find new theology to block the Bible, if we try to understand the mind of God, we all ways come to the same point- Orthodox!