Ben Harper makes elegant leaps from reggae to rock to folk to funk and back in his fifth studio album. The rootsy singer-songwriter with the silken tenor isn't merely genuflecting at the altar of his musical heroes, however. Harper’s first studio album in four years shows more quirky imagination and inventive musicianship than any of his earlier efforts. That said, "Diamonds on the Inside" is painted with the same brush that Bob Dylan used on "I Shall Be Released," but Harper adds his own Biblical aphorisms to make the song his own. Most of the songs display Harper's growth as a poet, as he ponders the dualities of life and love in tunes like the disturbing "Touch from Your Lust" and the disquietingly lyrical "Amen Omen." Harper is compelled to sing what is in his heart and to do what he can to make the world a better place. Witness the Marley-like "With My Own Two Hands." The only misstep on the whole disc is the overly humid orchestration of "When She Believes."