I've seen it in action.

[ though amos seems very much like her that way. if he hasn't seen it with his own eyes, perhaps he won't believe her at all. ]

A blind man, Chirrut. He singlehandedly defeated a whole troop of Imperials. I don't believe there's any other possible way for him to do that, at least not that's known.

[ a beat as she realizes what he's implying with the rest. ]

Only someone bestowed with that gift can wield the Force anyway. I'm not sure I'd trust myself to do it either, if I could.