Following the success of his major label debut, “good kid, m.A.A.d. city,” in 2012, the rapper Kendrick Lamar did not indulge in earthly luxuries. Instead, he got baptized. That album was the story of his redemption, not just from street gangs through rapping but from a life of sin by embracing Jesus Christ. His long-awaited follow-up, “To Pimp a Butterfly” (TDE/Aftermath/Interscope) is about carrying the weight of that clarity: What happens when you speak out, spiritually and politically, and people actually start to listen? Find outHERE.