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.

1795. 'And the steward of my house' means the external Church. This is clear from the meaning in the internal sense of 'steward of the house', that is, in reference to the Church. The external Church is called 'the steward of the house' when the internal Church itself is 'the house' and the head of the household is the Lord. The position which the external Church occupies is nothing other than this, for all stewardship belongs to the external side of the Church, such as the performance of rituals and many other duties connected with the Temple and the Church itself, that is, Jehovah's or the Lord's House.

[2] The external things of the Church when they are without the internal things are of no value. It is to those internal things that they owe their existence, and in character they are the same as those internal things. The situation with them is as it is with man: with him what is external or bodily is in itself something valueless unless that which is internal exists to give it soul and life. As is the character therefore of that which is internal, so is the character of that which is external; or, as is the character of the disposition and mind (animus et mens), so is the worth of all the things which come forth through that which is external or bodily. The things of the heart make man, not those of the lips and gestures. It is the same with the internal things of the Church. Nevertheless the external things of the Church are as the external things with man, in that they serve as stewards or overseers; or what amounts to the same, the external or bodily man may be called the steward or overseer of the house when 'the house' is that which belongs to interior things. From this it is evident what 'childless' means, namely a time when no internal dimension of the Church exists, only an external, as it was at the time regarding which the Lord made complaint.