Are there any quotes that relate to ego defense mechanisms for The Lord of the Flies?

I can think of one scene that may be an example of the ego
defense mechanism that you are looking for.  There is a type of second election for
chief in a meeting called by Jack.  This meeting is found in the chapter entitled "Gift
for the Darkness."  Jack says, "Hands up, whoever wants Ralph not to be chief?"  His
question is met with silence.  Jack's reaction comes in the form of "humiliating
tears."  He covers his pain by disappearing into the woods and saying, "I'm not going to
play any longer. Not with you."  When some of the boys find their way to Jack, he is
"brilliantly happy." 

Many of Jack's responses are a result
of his trying to cover his embarrassment.  When Ralph accuses him of letting the fire go
out in Chapter 4, Jack responds that he killed a pig.  When Ralph insists that Jack had
let the fire go out, Jack in his anger, hits Piggy. 

Jack
uses escape, blame diversion, misplaced anger and violence as mechanism of coping with
threats to his ego.