".. [do] we delude ourselves in even trying to think about, let alone understand, what the void, the vacuum, the nothingness into which the universe is expanding, the space between atomic particles, the absolute within and beyond things, is?"

What many people mean when they say "think about" is to come to some firm, intellectually unjustified opinion and give it the same status as an opinion that's actually supported by evidence.

We can try to figure things out or we can play tin-like. Some times the best one can say is, "I don't know" rather than to just make things up. This is a form of anti-knowledge.