Sam Cooke's genre-defining soul songs mingled airy romance with gospel-forged messages of personal resilience. His student Bobby Womack updated the approach for the sultry ‘70s with “That's the Way I Feel About ‘Cha,” while Donny Hathaway's “Someday We'll All Be Free” and Bill Withers' “Lean on Me” live up to the universal inspiration of Cooke's civil rights standard “A Change Is Gonna Come.”