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.

2805. 'Where is the animal for a burnt offering?' means, Where are those members of the human race who are to be sanctified? This is clear from the representation of sacrifices, in particular burnt offerings. Burnt offerings and sacrifices were representative of internal worship, see 922, 923; they were made from the flock and from the herd - when from the flock, lambs, sheep, she-goats, kids, rams, or he-goats were used, when from the herd, oxen, young bulls, or calves, all of which meant various kinds of celestial and spiritual things - see 922, 1823, 2180; and by means of them people were sanctified, 2776. From all this it may become clear that Isaac's question, 'Where is the animal for the burnt offering?' means, Where are those members of the human race who are to be sanctified? The same is more plainly evident from what comes next, that is to say, from the reply made by Abraham his father, 'God will see for Himself to the animal for a burnt offering', verse 8, which means that the Divine Human will provide those who are to be sanctified; from the fact that later on he saw a ram behind him caught by its horns in a thicket, and offered that as the burnt offering, verse 13, which means members of the human race who belong to the Lord's spiritual Church; as well as from the details that follow after this in verses 14-17.