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.

5102. 'Saying, Why are your faces sad today?' means, What affection gives rise to this sadness? This is clear from the meaning of 'faces' as the things that are within, dealt with in 358, 1999, 2434, 3527, 4066, 4796, 4797, and so as the affections, for a person's interiors from which his thoughts spring - which are also things that are within - are his affections; and being aspects of his love, these affections are essentially his life. It is well known that the affections reveal themselves in the faces of those who are in a state of innocence; and when those affections reveal themselves, so too does a general impression of their thoughts, for people's thoughts are the forms their affections take. Regarded in itself therefore the face is nothing else than an image representing the things that are within.

[2] No face is looked at by the angels in any other way, for angels do not see the material but the spiritual form that a person's face takes; that is, they see the form presented by his affections and the thoughts springing from those affections. These are the essential components of the human face, as anyone may recognize from the fact that when bereft of thought and affections the face is completely dead, and that the face is enlivened by them and owes its pleasing looks to them. The sadness expressing some affection, or an affection which gives rise to sadness, is meant by Joseph's words, Why are your faces sad today?