A new house would reflect the idea of having acquired a new mental attitude. While you have tried living with this new attitude for a while, you still do not really like it. The old house would represent a state of mind and mental attitude with which you felt very comfortable with the opinions and beliefs being used.
When using the new mental attitude you are finding that there is a particular point of view that you did not realize belongs to this new attitude and way of thinking. As this is a room you "find", it implies that this point of view is "a find" - i.e. it reflects a way of thinking to be considered as one to treasure or value.