Repitition

I did Tyrion's chapter that begins on p. 118. I noticed a repeat of words like darkness, black and then also a repeat of directions (especially north). With regard to the directions, I think Martin wants the reader to keep mental maps in their heads as they read. Also, North is where Winterfell is located and I feel like is the most "comfortable" area in the book as of right now. When I say comfortable, I mean that Winterfell and the northern part of the land is the safeguard for the Starks and whenever the setting is in Winterfell, I've felt most relaxed while reading because other than Bran's incident nothing truly bad has happened there. That isn't really dealing with Tyrion as much but Martin also uses these negative terms like darkness and black not necessarily as setting points but to also convey a mood. I think subconsciously, while reading those repeated words, it allows the reader to already feel a dark state of gloom. If the chapter is from Tyrion's perspective, does that mean he is feeling this contrast of dark being scarier and smaller being equal to darkness. Martin also used a past reference of a place called Summer Isle right after mentioning the Winter night and I wonder if that contrast was on purpose as well to relate to a happier point in Tyrion's life compared to the dread of going to the wall in the Winter's night.