“I can’t stop, I just can’t stop!” sang soul icon Al Green, 79, enthusiastically and appropriately at the top of a set Saturday night just outside Chicago. “No, I can’t stop. No, no, no!” Green’s ...

From steamy secular classics (“Love and Happiness,” “Let's Stay Together”) to no-foolin' praise songs (“Jesus Is Waiting”), the Reverend Al Green's devotion to matters of the heart is unparalleled in ...