It is interesting that Terah was moving with Abram. We also read there in Joshua 24:2 that Terah worshipped other gods. Now perhaps what we are seeing here is at least the beginning of the conversion of Terah, that Terah was either being converted or maybe he repented. I do not know because he was beginning to move with Abraham from the land of Ur to Haran, but he died before they could actually leave.
Now I do not think that I am going too far in saying that, as we would look at it today, what Abraham had gathered around him was what we would call the church on earth at that time and that they were beginning a period of pilgrimage, a wandering. There was a forerunner of the children of Israel wandering in the wilderness, and even today is a forerunner of our spiritual wandering in this world that is opposed to God.