The excerpt from Vladimir Nabokov's "Lolita" illustrates the deep and complex emotions the narrator feels for the titular character, Lolita. He describes her as the light and fire of his existence, indicating that she is both a profound source of inspiration and a significant part of his turmoil. The intricate play with her name emphasizes his obsession and the overwhelming effect she has on him, showing how even the way her name is spoken holds meaning and significance for him.