I think this quote pretty much sums up the book. I can't actually remember in which part of the book this quote is from, but it can be interpreted as the physical pain that war brings, the emotional pain because of the many losses it causes, or pain because of a heartbreak.
Just in case you are unaware, an absolutist is someone that completely opposes the war- they refuse to fight in it, or help out in any other way. Nowadays, I think the majority of people are against war, but during WWI, they were considered cowards or 'feather men'. There were also conscientious objectors, who were those who refused to fight in the War, but helped out in other ways, e.g. by being a stretcher bearer. I actually learnt many things by reading this book. It's not very educational, but I was just ignorant about WWI before.
