How to better explain it? He sighs, not out of frustration or any particular emotion. Wanting to mess with his hands, but he already is, so-

"You're talking about time. We already know the train doesn't care about time, right? People come from different points in time - you and Gen do too, right? And there's bigger differences between people. What I'm talking about is..."

He looks about the kitchen for some kind of example. The stove? He points at it with his knife. "Imagine if you didn't have power for that, and you..."

--but does that work? Tidus frowns, aiming the knife down as he tries thinking. Ugh, how can he explain?

"I can't have anything anchor to me," he says slowly.