Actually, it wasn't that those things, in themselves, revealed anything at all; it was just that people, looking at what was occurring around them, could find a means of penetration to the Soul of the World.
“Why would the desert reveal such things to a stranger, when it knows that we have been here for generations?” said another of the chieftains.
Arms are as capricious as the desert, and, if they are not used, the next time they might not function. If at least one of them hasn't been used by the end of the day tomorrow, one will be used on you.