A concert I attended last month included George Gershwin’s “Summertime.” Not a favourite of mine, but that evening I felt the song’s appeal. In music and words, it carries a sense of relaxed fullness, an invitation into a lush, protected place where the “livin’ is easy,” the harshness of the world far-off at the edges: “fish are jumpin’ and the cotton is high... there ain’t nothin’ can harm you, with mama and daddy standin’ by.”