This is a book I wrote my undergraduate graduation paper on. It feels good to reread it and the quotes from it.
(From Goodread, https://www.goodreads.com/work/quotes/4652599-a-farewell-to-arms?page=1)
“Maybe…you’ll fall in love with me all over again.”
“Hell,” I said, “I love you enough now. What do you want to do? Ruin me?”
“Yes. I want to ruin you.”
“Good,” I said. “That’s what I want too.” (2836 likes)

“The world breaks every one and afterward many are strong at the broken places.” (1165 likes)

“I’m not brave any more darling. I’m all broken. They’ve broken me.” (1008 likes)
“And you’ll always love me won’t you?
Yes
And the rain won’t make any difference?
No” (781 likes) 
“But life isn’t hard to manage when you’ve nothing to lose.” (595 likes)
“When you love you wish to do things for. You wish to sacrifice for. You wish to serve.” (569 likes)
“No, that is the great fallacy: the wisdom of old men. They do not grow wise. They grow careful.” (510 likes)
“Often a man wishes to be alone and a girl wishes to be alone too and if they love each other they are jealous of that in each other, but I can truly say we never felt that. We could feel alone when we were together, alone against the others. But we were never lonely and never afraid when we were together.” (451 likes)
“I know the night is not the same as the day: that all things are different, that the things of the night cannot be explained in the day, because they do not then exist, and the night can be a dreadful time for lonely people once their loneliness has started.” (438 likes)
“God knows I had not wanted to fall in love with her. I had not wanted to fall in love with any one. But God knows I had and I lay on the bed in the room of the hospital in Milan and all sorts of things went through my head but I felt wonderful…” (327 likes)
“Why, darling, I don’t live at all when I’m not with you.” (311 likes)
“I’m not unfaithful, darling. I’ve plenty of faults but I’m very faithful. You’ll be sick of me I’ll be so faithful.” (256 likes)
“You’ve such a lovely temperature.” (194 likes)
“The coward dies a thousand deaths, the brave but one’…. (The man who first said that) was probably a coward…. He knew a great deal about cowards but nothing about the brave. The brave dies perhaps two thousand deaths if he’s intelligent. He simply doesn’t mention them.” (179 likes) 
“You know I don’t love any one but you. You shouldn’t mind because some one else loved me.” (171 likes)
“Wine is a grand thing,” I said. “It makes you forget all the bad.” (158 likes)
“Oh, darling, you will be good to me, won’t you? Because we’re going to have a strange life.” (149 likes)
“Keep right on lying to me. That’s what I want you to do.”  (137 likes)
“When I saw her I was in love with her. Everything turned over inside of me. She looked toward the door, saw there was no one, then she sat on the side of the bed and leaned over and kissed me.”  135 likes
“There isn’t always an explanation for everything.”  117 likes
“That night at the hotel, in our room with the long empty hall outside and our shoes outside the door, a thick carpet on the floor of the room, outside the windows the rain falling and in the room light and pleasant and cheerful, then the light out and it exciting with smooth sheets and the bed comfortable, feeling that we had come home, feeling no longer alone, waking in the night to find the other one there, and not gone away; all other things were unreal. We slept when we were tired and if we woke the other one woke too so one was not alone. Often a man wishes to be alone and a girl wishes to be alone too and if they love each other they are jealous of that in each other, but I can truly say we never felt that. We could feel alone when we were together, alone against the others … But we were never lonely and never afraid when we were together. I know that the night is not the same as the day: that all things are different, that the things of the night cannot be explained in the day, because they do not then exist, and the night can be a dreadful time for lonely people once their loneliness has started. But with Catherine there was almost no difference in the night except that it was an even better time. If people bring so much courage to the world the world has to kill them to break them, so of course it kills them. The world breaks every one and afterward many are strong at the broken places. But those that will not break it kills. It kills the very good and the very gentle and the very brave impartially. If you are none of these you can be sure it will kill you too but there will be no special hurry.”  113 likes
“There isn’t any me. I’m you. Don’t make up a separate me.”  99 likes
“You won’t do our things with another girl, or say the same things, will you?”    96 likes
“My life used to be full of everything. Now if you aren’t with me I haven’t a thing in the world.”  76 likes
“I had gone to no such place but to the smoke of cafes and nights when the room whirled and you needed to look at the wall to make it stop, nights in bed, drunk, when you knew that that was all there was, and the strange excitement of waking and not knowing who it was with you, and the world all unreal in the dark and so exciting that you must resume again unknowing and not caring in the night, sure that this was all and all and all and not caring.”  72 likes
“It could be worse,’ Passini said respectfully. “There is nothing worse than war.”
“Defeat is worse.”
“I do not believe it,” Passini said still respectfully. “What is defeat? You go home.”  62 likes
“Once in camp I put a log on a fire and it was full of ants. As it commenced to burn, the ants swarmed out and went first toward the center where the fire was; then turned back and ran toward the end. When there were enough on the end they fell off into the fire. Some got out, their bodies burnt and flattened, and went off not knowing where they were going. But most of them went toward the fire and then back toward the end and swarmed on the cool end and finally fell off into the fire. I remember thinking at the time that it was the end of the world and a splendid chance to be a messiah and lift the log off the fire and throw it out where the ants could get off onto the ground. But I did not do anything but throw a tin cup of water on the log, so that I would have the cup empty to put whiskey in before I added water to it. I think the cup of water on the burning log only steamed the ants.”  48 likes
“I don’t. I don’t want anybody else to touch you. I’m silly. I get furious if they touch you.” 46 likes
“Now I am depressed myself,’ I said. ‘That’s why I never think about these things. I never think and yet when I begin to talk I say the things I have found out in my mind without thinking.”  45 likes
“This was the price you paid for sleeping together. This was the end of the trap. This was what people got for loving each other.”  39 likes
“War is not won by victory.”  37 likes
“Because we would not wear any clothes because it was so hot and the windows open and the swallows flying over the roofs of the houses and when it was dark afterward and you went to the window very small bats hunting over the houses and close down over the trees and we would drink capri and the door locked and it hot and only a sheet and the whole night and we would both love each other all night in the hot night in Milan. That was how it ought to be.”  32 likes
“I did not say anything. I was always embarrassed by the words sacred, glorious, and sacrifice and the expression in vain. We had heard them, sometimes standing in the rain almost out of earshot, so that only the shouted words came through, and had read them on proclamations that were slapped up by billposters over other proclamations, now for a long time, and I had seen nothing sacred, and the things that were glorious had no glory and the sacrifices were like the stock yards at Chicago if nothing was done with the meat except to bury it.”  23 likes
“There were many words that you could not stand to hear and finally only the names of places had dignity. Certain numbers were the same way and certain dates and these with the names of the places were all you could say and have them mean anything. Abstract words such as glory, honor, courage, or hallow were obscene beside the concrete names of villages, the numbers of roads, the names of rivers, the numbers of regiments and the dates.” 19 likes
“Now Catherine would die. That was what you did. You died. You did not know what it was about. You never had time to learn. They threw you in and told you the rules and the first time they caught you off base they killed you. Or they killed you gratuitously like Aymo. Or gave you the syphilis like Rinaldi. But they killed you in the end. You could count on that. Stay around and they would kill you.”   17 likes
“You’re my religion. You’re all I’ve got.”  16 likes
“We think. We are not peasants. We are mechanics. But even the peasants know better than to believe in a war. Everybody hates war.
There is a class that control a country that is stupid and down not realise anything and never can. That is why we have this war.
Also they make money out of it.”  14 likes
“They were beaten to start with. They were beaten when they took them from their farms and put them in the army. That is why the peasant has wisdom, because he is defeated from the start. Put him in power and see how wise he is.”  13 likes
“I kissed her neck and shoulders. I felt faint with loving her so much.”   12 likes
“I had gone to no place where the roads were frozen and hard as iron, where it was clear cold and dry and the snow was dry and powdery and hare-tracks in the snow and the peasants took off their hats and called you Lord and there was good hunting. I had gone to no such place but to the smoke of cafés and nights when the room whirled and you needed to look at the wall to make it stop, nights in bed, drunk, when you knew that that was all there was, and the strange excitement of waking and not knowing who it was with you, and the world all unreal in the dark and so exciting that you must resume again unknowing and not caring in the night, sure that this was all and all and all and not caring. Suddenly to care very much and to sleep to wake with it sometimes morning and all that had been there gone and everything sharp and hard and clear and sometimes a dispute about the cost. Sometimes still pleasant and fond and warm and breakfast and lunch. Sometimes all niceness gone and glad to get out on the street but always another day starting and then another night. I tried to tell about the night and the difference between the night and the day and how the night was better unless the day was very clean and cold and I could not tell it; as I cannot tell it now”  12 likes
“I have noticed that doctors who fail in the practice of medicine have a tendency to seek one another’s company and aid in consultation.”  9 likes
“The war was a long way away. Maybe there wasn’t any war. There was no war here. Then I realized it was over for me. But I did not have the feeling that it was really over. I had the feeling of a boy who thinks of what is happening at a certain hour at the schoolhouse from which he has played truant.”  9 likes