Estinien isn't rushed with his answer, considering her words rather than focusing on appearances first. He's not certain about all of that - about destiny, and gods with plans beyond their comprehension. He doesn't have to be sure, though. Not right now.

She said 'for now' after all. Those two words make a world of difference. He is not a man who could sustain himself on faith alone indefinitely, but as they are? He's been wrong about things that seemed more insane when set against his conception of the world.

In some ways it would be nice for her to be right. He would like to be where he is supposed to be... wherever that is. If it truly were here as opposed to in Eorzea, maybe he would feel less like he's abandoned his loved ones to their deaths.

"I can," he says, and it's genuine. "What I wish... is for my world and this one to be spared. To flourish." He's worried about it all, anxious in his gut that it won't be enough to simply wait, but as he already said: he has no better answers. "If the gods can bring about our salvation... then I would seek their counsel first and foremost."

He pauses, and then adds:

"Or, what part of it I can comprehend."