"Billy, after all, had contemplated torture and hideous wounds at the beginning and the end of nearly every day of his childhood. Billy had an extremely gruesome crucifix hanging on the wall of his little bedroom in Ilium. A military surgeon would have admired the clinical fidelity of the artist's rendition of all Christ's wounds the spear wound, the thorn wounds, the holes that were made by the iron spikes. Billy's Christ died horribly. He was pitiful."
The reason that Billy does not seem to seek comfort in God is that he associates Christianity with a suffering Christ. Even though he is a chaplain's assistant before he is taken captive by the Germans, Billy has no true meaning for why he fights.
"And even if the wars didn't keep coming like glaciers, there would still be plain old death."
What billy is trying to say with this quote is that war really does not cause death. Death occurs naturally and war is a natural human thing to do. War isn't the reason for death in the world its just human nature.
"It is, in the imagination of combat's fans, the divinely listless love play that follows the orgasm of victory. It is called 'mopping up.”
What this quote is talking about is how he is a true war hero. Even though the war was won and got what he wanted, he feels bad for his actions and is gonna stay back and clean up the mess he made.
“Weary's version of the true war story went like this. There was a big German attack, and Weary and his anti tank buddies fought like hell until everybody was killed but Weary. So it goes. And then Weary tied in with two scouts, and they became close friends immediately, and they decided to fight their way back to their own lines. They were going to travel fast. They were damned if they'd surrender. They shook hands all around. They called themselves "The Three Musketeers." ”
What this quote is talking about is how Weary’s war story is a fantasized version of the actual war he's fighting in.