Rock's Bach: Intellectual, earthy, egotistical, introspective, enigmatic, and environmentally obsessed are just some of the terms of endearment that have been flung Sting's way in the seventeen years he's been working at the high-risk job of making popular music. But the Police's former chief is nothing if not a man stretched between the poles of his public personae. His sixth solo album, 'Mercury Falling' (A&M), is, as might be expected from this urstylist, a mosaic of musical styles. Less predictable, though, is the reconciled tone of the record, which offers telling clues that Sting's current existence as rock'n'roll paterfamilias - albeit one who practices yoga - is wearing well on him. Even a heartbreaking song about an impending divorce, 'I'm So Happy I Can't Stop Crying', is infectiously upbeat. And though, for the first time, he appears to be creating music in a conflict-free zone, he's far from complacent. We met during a break between the European and American segments of his latest tour at his New York apartment, over a ridiculously healthy lunch...