Jesus doesn't address the disciples' trouble by minimizing what's ahead. He's telling them this right before his own arrest and death, real, imminent loss. The command “do not let your hearts be troubled” isn't offered because nothing difficult is coming. It's offered alongside a specific, concrete promise: a place being prepared, not a vague future, but rooms, going, preparing, returning. And then the claim narrows even further. Not just a place, but a way, meaning the uncertainty about how to get there is answered too, not only the uncertainty about whether there's a destination.