Ah, I understand. I don’t think ultimate truth means nothing exists. To me ultimate truth transcends concepts, and “nothing exists” is firmly in the realm of the conceptual. I’m not taking a stand about the nature of existence, I’m questioning it: what it means, if it’s real, how it works. No worries if you’re not into it, most (sane) people and religions take existence as a given! 
And time is the handmaid of space…