“The grounding principle of the Small Science was "like calls to like," but then it got complicated.
Odinakovost was the "thisness" of a thing that made it the same as everything else.
Etovost was the "thatness" of a thing that made it different from everything else.
Odinakovost connected Grisha to the world, but it was etovost that gave them an affinity for something like air, or blood, or in my case, light.
Around then, my head started swimming. One thing did stand out to me: the word the philosophers used to describe people born without Grisha gifts, otkazat'sya, "the abandoned." It was another word for orphan.”