Once again I try to proximate a delusion with logic. One important requirement, that something can exist, is a shape, for a human it's body. The shape is it's 'boundary', whatever it is and if it would be infinite (literally and in regard to its expansion) or shapeless, it cannot exist, albeit whether this shape is visible for us or not. There is nothing and there can be nothing exist, that has no shape or limitation of its existence, therefore, an infinit being is a missbelief.
One could say: "And spiritual beings? We don't see they, but they exist." I would agree, but they exist not on this plane. On the plane they are exist, they need of course a shape to exist, f.e. the so called shells on the so called astral plane. But what's with thoughts, do it have a form, one could argue. I think we have here to differ in abstract and concrete things and it's not as easy as it sounds.
However, I'm talking about the infinit beeing and this, literal understand, as a beeing without any shape oder border, is not possible. The meaning of that within the theosophical teachings of HPB, in my opinion, is often that of a symbol. Or more exact, it should illustrate an abstract symbol (a symbol is not a being and is nothing that exists in that concrete way, it's abstract), often connected to space. And in regard to THE being, it should better see as something, that seems endless to us. This little word makes a huge difference.
For ancient people and it's limited knowledge, the solarsystem seemed infinit, but it isn't. The shape of it is at least the Heliosphere, which we cannot see with our physical eyes but nowdays with our scientific ones. For us and our knowledge, today, the whole universe or the being that represent that, SEEMS to be infinit, but literally it can't BE infinite, if we want to keep being logical (and in analogy, as above so below and vice versa).
What do you think?