People are always afraid of the unknown - and banding together against the Thing That Is Different From Us is a time-honoured tradition for rallying the masses. ↗
We have an unknown distance yet to run, an unknown river to explore. What falls there are, we know not; what rocks beset the channel, we know not; what walls ride over the river, we know not. Ah, well! we may conjecture many things. ↗
There are unknown forces in nature; when we give ourselves wholly to her, without reserve, she lends them to us; she shows us these forms, which our watching eyes do not see, which our intelligence does not understand or suspect. ↗
Not only I lost what I had in the ship, but from the captain and the company generally what was good or worth the taking was carried away; all which was done unknown to the emperor. ↗