What does it mean to be a gorilla

I'd like to start a list of all of the characteristics of a gorilla, according to Ivan. Will you help me make a list? I know I have missed some already. If you think of one add it in the comments section.

p.162   "Gorillas are terrible liars."

p. 126  "He was everything a silverback is meant to be: a guide, a teacher, a protector."

p. 3   "Gorillas are patient."

p. 51    "Gorillas are not complainers."