He leads for the benefit of others, rather than himself.
"Mildness about the eyes that proclaimed no devil."
The noun "mildness" suggests kindness but also weakness.
Ralph seems as ideal boy in society, both physically and morally.
The phrase "no devil" shows he may be somewhat different from other boys - this is an example of Ralph portraying in being religious on the island from the rest of the boys (except Simon).
"Don't you want to be rescued? All you can talk about is pig, pig, pig!"
Here, Ralph is portraying his frustration after Jack and his hunters let the signal/fire burn out while bunting a pig.
It also shows Ralph's exasperation with Jack's short sighted obsession with hunting and killing, rather than rescue.
This is an example of Golding presenting Ralph and Jack as polar twins to each other; they juxtapose throughout the novel.
"Things are breaking up. I don't understand why. We began well; we were happy."
The sentence shows Ralph's innocence and highlights the fact that he is still a child.
He also realises building a civilisation is difficult, particularly when everyone has conflicting ideas about how society should run.
"The desire to squeeze and hurt was over-mastering."
This sentence portrays that Ralph has similar weaknesses to the other boys; he senses blood lust in himself.
This is an example of man's essential illness; Golding portrays that every human has something within themselves that is sinister and can portray man's weakness if it is not controlled.
"The fire's the most important thing on the island."
The sentence symbolises hope, rescue and civilisation for the boys.
It highlights Ralph's dedication towards order and it contrasts with Jack's descent into savagery.
The "fire" represents their connection society and serves a metaphor for hope, however, its neglect later on foreshadows their collapse into chaos.
"The fire's the most important thing on the island."
The sentence shows the struggle between civilisation & savagery and Ralph's effort to keep the group focused and united, as they fall apart.
Golding's meaning of the sentence is that he critique's human's fragility and the loss of values for basic instincts.