Here are some quotes from my favorite books:
"There is a luxury in self-reproach. When we blame ourselves, we feel that no one else has a right to blame us. It is the confession, not the priest, that gives us absolution." - Oscar Wilde, The Picture of Dorian Gray
"You will be required to do wrong no matter where you go. It is the basic condition of life, to be required to violate your own identity. At some time, every creature which lives must do so. It is the ultimate shadow, the defeat of creation; this is the curse at work, the curse that feeds on all life. Everywhere in the universe." - Philip K. Dick, Do Androids Dream of Electric Sheep
"Why does that obstinate little voice in our heads torment us so? Could it be because it reminds us that we are our alive, of our mortality, of our individual souls--which, after all, we are too afraid to surrender but yet make us feel more miserable than any other thing? It is a terrible thing to learn as a child that one is a being separate from the world, that no one and nothing hurts along with one's burned tongues and skinned knees, that one's aches and pains are all one's own. Even more terrible, as we grow older, to learn that no person, no matter how beloved, can ever truly understand us. Our own selves make us most unhappy, and that's why we're so anxious to lose them, don't you think?" Donna Tartt, The Secret History
"I must not fear. Fear is the mind-killer. Fear is the little-death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. When the fear is gone there will be nothing. Only I remain." - Frank Herbert, Dune
"Among other things, you'll find that you're not the first person who was ever confused and frightened and even sickened by human behavior. You're by no means alone on that score, you'll be excited and stimulated to know. Many, many men have been just as troubled morally and spiritually as you are right now. Happily, some of them kept records of their troubles. You'll learn from them—if you want to. Just as someday, if you have something to offer, someone will learn something from you. It's a beautiful reciprocal arrangement. And it isn't education. It's history. It's poetry." - J.D. Salinger, The Catcher in the Rye