A "house" is essentially a container -- for a person, a family, several families or even a large group with shared interests (think of the term "houses of worship.") In the Bible, a "house" is also a container, but for spiritual things rather than natural things. In various uses a "house" can represent part of the mind, the whole mind, a whole person or even a church. The other nuance to the word "house" is that it is generally used in regards to our affections and desires rather than our thoughts and principles. This makes sense; we tend to engage our thoughts and rationality when we are out in the world doing our work, but when we are inside our houses we are driven most by love for our families and the desire to be good to those we love. So "house" tends to represent the things we want and care about -- which are ultimately the things that define us.

9452. The Lord in Divine Mercy regenerates a person, and that regeneration goes on from his early childhood right through to the final period of life in the world, and after that for evermore. By this means in Divine Mercy He draws the person away from evils and falsities and brings him to the truths of faith and forms of the good of love, and then maintains him in them. And after this in Divine Mercy He raises him towards Himself, up to heaven, and fills him with bliss. These are the things that are meant by the forgiveness of sins owing to mercy. People who think that sins are forgiven in any other way are completely mistaken. For to see a great number of people in hell and not to save them if this could be achieved in any other way would be the absence of mercy, when yet the Lord is Mercy itself, desiring the death of no one, but rather that he may live.