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.

3643. I have noticed that those in heaven dwell beneath a clear, bright sky like that of morning and midday, extending also towards evening, and likewise in a warmth like that of spring, summer, and autumn. But those in hell dwell under a dim, cloudy, and darkened sky, and also in the cold [of winter]. I have noticed that between the two in general a balance is kept; also that insofar as love, charity, and consequently faith are present in angels, they dwell under a clear sky and in the warmth of spring, and that insofar as hatred and consequently falsity are present in those in hell they dwell in thick darkness and in coldness. And as stated above, the light in the next life holds intelligence within it, the warmth love within it, while thick darkness holds insanity within it, and cold hatred within it.