The lazy take on Cat Stevens is that he was a hippie singer songwriter type who lost his nut somewhere along the line and suddenly decided Allah was Great and death to the infidels (or whatever). Which is mostly wrong. And rather completely misses the point that, even with all the MOR hippie hits (most of which weren’t really that bad), he could still genuinely surprise on occasion. Case in point, Bitterblue, particularly the guitar bit near the beginning, when it suddenly kicks from standard strumming into an almost mystical overdrive. Allah be praised.