Windows to our Souls

For my paper, I would really like to further investigate the metaphor between windows (and ultimately rooms as well) and our souls. I feel that Virginia Woolf consciously made the effort to depict our homes as our souls; that as we retreat into our rooms (as the old woman does at the end of the book) we are also retreating into our souls.
I'll start with Septimus' suicide--it seems to be the perfect example of this metaphor. With Septimus, a man who feels as though he is being torn apart by the strict norms of society, I found it rather odd (and fitting) that he would jump out of his window (thus leaving his "soul") and impale himself on a railing--literally a barrier between the home and society. I'd also like to see if Septimus' suicide is really a rejection or acceptance of society; by committing suicide he is rejecting society but the symbolism behind the window and the railing could mean that he is trying to accept society in his last moments. Or perhaps it was some cruel joke Woolf plays on him (how fitting that he just happens to land on a railing, of all things).
So this is what I'd like to write about, but knowing me I'll probably go off on a tangent somewhere in my paper about trees being a metaphor for souls as well :)