At a certain stage in his evolution, man himself had been able to lay hold upon a higher order of things, which raised him above the level of the beasts that perish, and enabled him to see, at least in the distance, the shining towers of the City of God. ↗
I think the only boundaries are individual and personal. A writer should be free to write about anything he or she wants to, including the twin towers. I have made small references to 9/11 in my past two books. ↗
The reason bin Laden staggered the planes going into the towers was so every camera would be focused on the second tower when the plane hit. It was not only the murder, but the perpetual image of the horror that permeated into people's consciousness. ↗
A great city, whose image dwells in the memory of man, is the type of some great idea. Rome represents conquest; Faith hovers over the towers of Jerusalem; and Athens embodies the pre-eminent quality of the antique world, Art. ↗