To build motivation for the character gives a backbone to the story and about the Arthur for example if the Arthur got the motivation from seeing a kid take a candy out of a store that motivation for that character would be a bad guy or a heel and or antagonist there for the motivation for a character is very important they reveal it so you can get a bit of a background on the character in more information on the story and the Arthur.
Sure! How about a cat standing in front of a mirror looking at its reflection. Instead of seeing its true reflection (reality), it sees itself as a great big lion (perception).
Hope I helped!
Maybe fate does control everything.
The words the author chooses to use in a passage can change the whole tone and feeling of the story in many different ways, or add depth and detail to the story.