This quote comes from Kurt Vonnegut’s fourth novel, “Cat’s Cradle,” a work of satirical science fiction that takes aim at everything from science and technology to morality, the purpose of religion, and the global arms race. In his fictional works and his frequently amusing talks and lectures, Vonnegut often raised the subject of human relationships and love — albeit infused with his characteristic blend of romanticism, skepticism, and dark humor. For Vonnegut, love was something fundamental — something that gives life meaning. As the character Malachi Constant says in “The Sirens of Titan,” Vonnegut’s second novel, “A purpose of human life, no matter who is controlling it, is to love whoever is around to be loved.”