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.

1524. A blazing flame streamed down unexpectedly in front of me, blinding with its power not only the sight of my eyes but also my interior sight. Shortly afterwards a kind of obscurity appeared like a dark cloud containing so to speak something earthy. While I wondered at this I was led to realize that the light among angels in heaven is, in contrast to the light in the world of spirits, so much greater. Although spirits do live in light it is nevertheless as different as that. And as is the case with the light, so too are the intelligence and wisdom of angels superior to the intelligence and wisdom of spirits; and not only their intelligence and wisdom, but also everything connected with these, such as speech, thought, joy, and forms of happiness, for these correspond to the light. From this it has also become clear to me how great angelic perfection is, and what its nature is in contrast to that of men whose obscurity is even greater than that of spirits.