Cheryl Strayed’s clear, steely wisdom is the driving force behind much of her work, including her “Dear Sugar” advice column. Rather than offering readers platitudes about patience or perseverance, the author of “Wild” states an uncomfortable truth about love: It cannot be negotiated. “You cannot convince people to love you. This is an absolute rule,” she said when asked what advice she’d give her 20-something self. “No one will ever give you love because you want him or her to give it.” Instead, Strayed encourages self-respect over yearning and beseeching. Her advice isn’t cynical but rather revelatory for anyone hoping to build meaningful, lasting relationships.