Because of that she had never had enough energy to be herself, a person who, like everyone else in the world, needed other people in order to be happy. But other people were so difficult. They reacted in unpredictable ways, they surrounded themselves with defensive walls, they behaved just as she did, pretending they didn't care about anything. When someone more open to life appeared, they either rejected them outright or made them suffer, consigning them to being inferior, ingenuous.
Paulo CoelhoAn enemy always represents a weakness. This might be fear of physical pain, but it could also be a premature sense of victory or the desire to abandon the fight because it is no longer worthwhile.
Paulo Coelho